@book{4000,
	author = {Fuentes de Piedrahita, Cilia L},
	title = {Manejo y Control de las Malezas en el Cultivo del Fríjol: Guía de Estudio /},
	publisher = {CIAT,},
	year = {1983.},
	series = {04SW-02.02},
	address = {Cali :}
}