@book{1186,
	author = {Valenzuela, German S and Gómez, Alvaro},
	title = {Manejo y Control Integrado de Malezas en Cafetales y Potreros de la Zona Cafetera /},
	publisher = {Federacion Nacional de Cafeteros de Colombia,},
	year = {1985.},
	address = {Chinchina :}
}