81803. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4803.   Softbound, usual signs of use, text in very good condition.    $5.00

81804. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4804.   Softbound, usual signs of use, text in very good condition.    $5.00

81806. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4805.   Softbound, usual signs of use, text in very good condition.    $5.00

81807. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4806.   Softbound, usual signs of use, text in very good condition.    $8.00

81724. AAAS.   Science.   American Association for the Advancement of Science, 1985, Science, Volume 230, Number 4728.   Softbound, usual signs of use, text in very good condition.    $5.00

81795. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4795.   Softbound, usual signs of use, text in very good condition.    $5.00

81662. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4668.   Softbound, usual signs of use, text in very good condition.    $5.00

81649. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4655.   Softbound, usual signs of use, text in very good condition.    $5.00

81650. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4656.   Softbound, usual signs of use, text in very good condition.    $5.00

81652. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4658.   Softbound, usual signs of use, text in very good condition.    $5.00

81653. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4659.   Softbound, usual signs of use, text in very good condition.    $5.00

81654. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4660.   Softbound, usual signs of use, text in very good condition.    $5.00

81655. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4661.   Softbound, usual signs of use, text in very good condition.    $5.00

81656. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4662.   Softbound, usual signs of use, text in very good condition.    $5.00

81657. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4663.   Softbound, usual signs of use, text in very good condition.    $5.00

81659. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4665.   Softbound, usual signs of use, text in very good condition.    $5.00

81726. AAAS.   Science.   American Association for the Advancement of Science, 1985, Science, Volume 230, Number 4730.   Softbound, usual signs of use, text in very good condition.    $5.00

81661. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4667.   Softbound, usual signs of use, text in very good condition.    $5.00

81646. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4652.   Softbound, usual signs of use, text in very good condition.    $5.00

81663. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4669.   Softbound, usual signs of use, text in very good condition.    $5.00

81664. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4670.   Softbound, usual signs of use, text in very good condition.    $5.00

81665. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4671.   Softbound, usual signs of use, text in very good condition.    $5.00

81666. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4672.   Softbound, usual signs of use, text in very good condition.    $5.00

81667. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4673.   Softbound, usual signs of use, text in very good condition.    $5.00

81668. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4674.   Softbound, usual signs of use, text in very good condition.    $5.00

81669. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4675.   Softbound, usual signs of use, text in very good condition.    $5.00

81670. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4676.   Softbound, usual signs of use, text in very good condition.    $5.00

81671. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4677.   Softbound, usual signs of use, text in very good condition.    $5.00

81672. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 226, Number 4678.   Softbound, usual signs of use, text in very good condition.    $5.00

81660. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 225, Number 4666.   Softbound, usual signs of use, text in very good condition.    $5.00

81635. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4641.   Softbound, usual signs of use, text in very good condition.    $5.00

81623. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4629.   Softbound, usual signs of use, text in very good condition.    $5.00

81319. AAAS.   Science.   American Association for the Advancement of Science, 1998, Science, Volume 281, Number 5380.   Softbound, xlib, minor signs of use, text in very good condition.    $5.00

81625. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4631.   Softbound, usual signs of use, text in very good condition.    $5.00

81626. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4632.   Softbound, usual signs of use, text in very good condition.    $5.00

81627. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4633.   Softbound, usual signs of use, text in very good condition.    $5.00

81628. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4634.   Softbound, usual signs of use, text in very good condition.    $5.00

81629. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4635.   Softbound, usual signs of use, text in very good condition.    $5.00

81630. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4636.   Softbound, usual signs of use, text in very good condition.    $5.00

81631. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4637.   Softbound, usual signs of use, text in very good condition.    $5.00

81632. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4638.   Softbound, usual signs of use, text in very good condition.    $5.00

81648. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4654.   Softbound, usual signs of use, text in very good condition.    $5.00

81634. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4640.   Softbound, usual signs of use, text in very good condition.    $5.00

81647. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4653.   Softbound, usual signs of use, text in very good condition.    $5.00

81636. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4642.   Softbound, usual signs of use, text in very good condition.    $5.00

81637. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 223, Number 4643.   Softbound, usual signs of use, text in very good condition.    $5.00

81638. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4644.   Softbound, usual signs of use, text in very good condition.    $5.00

81639. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4645.   Softbound, usual signs of use, text in very good condition.    $5.00

81640. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4646.   Softbound, usual signs of use, text in very good condition.    $5.00

81641. AAAS.   Science.   American Association for the Advancement of Science, 1984, Science, Volume 224, Number 4647.   Softbound, usual signs of use, text in very good condition.    $5.00