@book{507,
	author = {Medrano S., Carlos.},
	title = {Las malezas en potreros y su control},
	publisher = {Universidad de Zulia. Facultad de Agronomía,},
	year = {1978},
	series = {Agro-Técnico},
	address = {Maracaibo, Venezuela :},
	note = {36-224}
}