@book{70122,
	author = {Coombs, J. and Colegio de Postgraduados. Chapingo, Méx.},
	title = {Técnicas en fotosíntesis y bioproductividad},
	publisher = {Futura,},
	year = {1988},
	address = {México, D. F. :},
	note = {19-155}
}