81744. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4750.   Softbound, usual signs of use, text in very good condition.    $5.00

81745. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4752.   Softbound, usual signs of use, text in very good condition.    $5.00

81746. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4753.   Softbound, usual signs of use, text in very good condition.    $5.00

81747. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4754.   Softbound, usual signs of use, text in very good condition.    $5.00

81749. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 232, Number 4755.   Softbound, usual signs of use, text in very good condition.    $5.00

81779. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4784.   Softbound, usual signs of use, text in very good condition.    $5.00

81737. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 231, Number 4743.   Softbound, usual signs of use, text in very good condition.    $5.00

81823. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4823.   Softbound, usual signs of use, text in very good condition.    $5.00

81812. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4811.   Softbound, usual signs of use, text in very good condition.    $5.00

81813. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4813.   Softbound, usual signs of use, text in very good condition.    $5.00

81814. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4814.   Softbound, usual signs of use, text in very good condition.    $5.00

81815. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4815.   Softbound, usual signs of use, text in very good condition.    $5.00

81816. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4816.   Softbound, usual signs of use, text in very good condition.    $5.00

81817. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4817.   Softbound, usual signs of use, text in very good condition.    $5.00

81818. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4818.   Softbound, usual signs of use, text in very good condition.    $5.00

81819. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4819.   Softbound, usual signs of use, text in very good condition.    $5.00

81820. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4820.   Softbound, usual signs of use, text in very good condition.    $5.00

81777. AAAS.   Science.   American Association for the Advancement of Science, 1986, Science, Volume 234, Number 4781.   Softbound, usual signs of use, text in very good condition.    $5.00

81822. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4822.   Softbound, usual signs of use, text in very good condition.    $5.00

81808. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4807.   Softbound, usual signs of use, text in very good condition.    $5.00

81825. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4824.   Softbound, usual signs of use, text in very good condition.    $5.00

81826. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4825.   Softbound, usual signs of use, text in very good condition.    $5.00

81828. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4826.   Softbound, usual signs of use, text in very good condition.    $5.00

81829. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4827.   Softbound, usual signs of use, text in very good condition.    $5.00

81830. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4828.   Softbound, usual signs of use, text in very good condition.    $5.00

81831. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4829.   Softbound, usual signs of use, text in very good condition.    $5.00

81832. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4830.   Softbound, usual signs of use, text in very good condition.    $5.00

81833. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4831.   Softbound, usual signs of use, text in very good condition.    $5.00

81834. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4832.   Softbound, usual signs of use, text in very good condition.    $5.00

81835. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4833.   Softbound, usual signs of use, text in very good condition.    $5.00

81821. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 237, Number 4821.   Softbound, usual signs of use, text in very good condition.    $5.00

81797. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4797.   Softbound, usual signs of use, text in very good condition.    $5.00

81780. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4785.   Softbound, usual signs of use, text in very good condition.    $5.00

81781. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4786.   Softbound, usual signs of use, text in very good condition.    $5.00

81782. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4787.   Softbound, usual signs of use, text in very good condition.    $5.00

81783. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4788.   Softbound, usual signs of use, text in very good condition.    $5.00

81784. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4789.   Softbound, usual signs of use, text in very good condition.    $5.00

81785. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4790.   Softbound, usual signs of use, text in very good condition.    $5.00

81786. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4791.   Softbound, usual signs of use, text in very good condition.    $5.00

81787. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4792.   Softbound, usual signs of use, text in very good condition.    $5.00

81792. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4793.   Softbound, usual signs of use, text in very good condition.    $5.00

81793. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4794.   Softbound, usual signs of use, text in very good condition.    $5.00

81811. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4809.   Softbound, usual signs of use, text in very good condition.    $5.00

81796. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 235, Number 4796.   Softbound, usual signs of use, text in very good condition.    $5.00

81810. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4808.   Softbound, usual signs of use, text in very good condition.    $5.00

81798. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4798.   Softbound, usual signs of use, text in very good condition.    $5.00

81799. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4799.   Softbound, usual signs of use, text in very good condition.    $5.00

81800. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4800.   Softbound, usual signs of use, text in very good condition.    $5.00

81801. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4801.   Softbound, usual signs of use, text in very good condition.    $5.00

81802. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 236, Number 4802.   Softbound, usual signs of use, text in very good condition.    $5.00