Tropics bibliography

Baker, H. G., 1970, Evolution in the tropics: Biotropica, v. 2, p. 101-111.

Beard, J. S., 1955, The classification of tropical American vegetation types: Ecology, v. 36, p. 89-100.

Dobzhansky, T., 1950, Evolution in the Tropics: American Scientist, v. 38, p. 208-221.