@book{36986,
	author = {Norman, M. J. T. and Norman, M. J. T.},
	title = {Tropical food crops in their environment /},
	publisher = {Cambridge University Press,},
	year = {1996.},
	address = {Cambridge :},
	edition = {2nd ed.},
	note = {Originally published as: The ecology of tropical food crops. Cambridge : Cambridge University Press, 1995.}
}