81441. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4459.   Softbound, usual signs of use, text in very good condition.    $5.00

81442. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4460.   Softbound, usual signs of use, text in very good condition.    $5.00

81443. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4461.   Softbound, usual signs of use, text in very good condition.    $5.00

81445. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4462.   Softbound, usual signs of use, text in very good condition.    $5.00

81447. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4463.   Softbound, usual signs of use, text in very good condition.    $5.00

81448. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4464.   Softbound, usual signs of use, text in very good condition.    $5.00

81449. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4465.   Softbound, usual signs of use, text in very good condition.    $5.00

81434. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4452.   Softbound, usual signs of use, text in very good condition.    $5.00

81765. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4771.   Softbound, usual signs of use, text in very good condition.    $5.00

81753. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4759.   Softbound, usual signs of use, text in very good condition.    $5.00

81754. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4760.   Softbound, usual signs of use, text in very good condition.    $5.00

81756. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4762.   Softbound, usual signs of use, text in very good condition.    $5.00

81757. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4763.   Softbound, usual signs of use, text in very good condition.    $5.00

81758. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4764.   Softbound, usual signs of use, text in very good condition.    $5.00

81759. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4765.   Softbound, usual signs of use, text in very good condition.    $5.00

81760. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4766.   Softbound, usual signs of use, text in very good condition.    $5.00

81761. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4767.   Softbound, usual signs of use, text in very good condition.    $5.00

81762. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4768.   Softbound, usual signs of use, text in very good condition.    $5.00

81778. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4782.   Softbound, usual signs of use, text in very good condition.    $5.00

81764. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4770.   Softbound, usual signs of use, text in very good condition.    $5.00

81750. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4756.   Softbound, usual signs of use, text in very good condition.    $5.00

81767. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4772.   Softbound, usual signs of use, text in very good condition.    $5.00

81768. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4773.   Softbound, usual signs of use, text in very good condition.    $5.00

81769. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4774.   Softbound, usual signs of use, text in very good condition.    $5.00

81771. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4775.   Softbound, usual signs of use, text in very good condition.    $5.00

81772. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4776.   Softbound, usual signs of use, text in very good condition.    $5.00

81773. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4777.   Softbound, usual signs of use, text in very good condition.    $5.00

81774. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4778.   Softbound, usual signs of use, text in very good condition.    $5.00

81775. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4779.   Softbound, usual signs of use, text in very good condition.    $5.00

81776. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4780.   Softbound, usual signs of use, text in very good condition.    $5.00

81622. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4628.   Softbound, usual signs of use, text in very good condition.    $5.00

81763. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 233, Number 4769.   Softbound, usual signs of use, text in very good condition.    $5.00

81739. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4745.   Softbound, usual signs of use, text in very good condition.    $5.00

81727. AAAS.   Science.   American Association for the Advancement of Science, 1985, Science, Volume 230, Number 4731.   Softbound, usual signs of use, text in very good condition.    $5.00

81728. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4733.   Softbound, usual signs of use, text in very good condition.    $5.00

81729. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4734.   Softbound, usual signs of use, text in very good condition.    $5.00

81730. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4735.   Softbound, usual signs of use, text in very good condition.    $5.00

81731. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4736.   Softbound, usual signs of use, text in very good condition.    $5.00

81732. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4738.   Softbound, usual signs of use, text in very good condition.    $5.00

81733. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4739.   Softbound, usual signs of use, text in very good condition.    $5.00

81734. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4740.   Softbound, usual signs of use, text in very good condition.    $5.00

81735. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4741.   Softbound, usual signs of use, text in very good condition.    $5.00

81736. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4742.   Softbound, usual signs of use, text in very good condition.    $5.00

81752. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4758.   Softbound, usual signs of use, text in very good condition.    $5.00

81738. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4744.   Softbound, usual signs of use, text in very good condition.    $5.00

81751. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4757.   Softbound, usual signs of use, text in very good condition.    $5.00

81740. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4746.   Softbound, usual signs of use, text in very good condition.    $5.00

81741. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4747.   Softbound, usual signs of use, text in very good condition.    $5.00

81742. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4748.   Softbound, usual signs of use, text in very good condition.    $5.00

81743. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4749.   Softbound, usual signs of use, text in very good condition.    $5.00