@book{170772,
	author = {Pérez Trujillo, Héctor},
	title = {El cultivo de frijol en Zacatecas  /},
	publisher = { SARH, Instituto nacional de investigaciones forestales y agropecuarias,},
	year = {1990},
	address = {México  :},
	note = {D. (Folleto para productores, 1)}
}