1. Allard, Harry A. 1932. ‹Length of Day in Relation to the Natural and Artificial Distribution of Plants.’ Ecology 13: 221–234.
2. Allen, John. 1991. Biosphere 2: The Human Experiment. New York:Viking Penguin.
3. Anonymous. 1925. “Purposes of the Institute.” Contributions from Boyce Thompson Institute for Plant Research 1: 9–24.
4. Appel, Toby A. 2000. Shaping Biology: The National Science Foundation and American Biological Research, 1945–1975. Baltimore and London:Johns Hopkins University Press.
5. Bocking, Stephen. 1997. Ecologists and Environmental Politics: A History of Contemporary Ecology. New Haven:Yale University Press.