@book{114545,
	author = {Metcalfe, Darrel S. and Elkins, Donald M.},
	title = {Producción de cosechas},
	publisher = {Editorial Limusa},
	year = {c1987.},
	address = {México},
	edition = {4th ed.},
	note = {Translation of : Crop production: principles and practices.}
}