@book{2235,
	author = {Contreras de la Flor, Sergio Alejandro.},
	title = {Labranza de conservación en ajonjolí (Sesamum indicum L.): experiencia demostrativa en San Luis Río Colorado, Sonora},
	publisher = {El Autor,},
	year = {1991},
	address = {Chapingo, Méx. :},
	note = {D45-18}
}