@book{1318,
	author = {Benítez Lordmendez, José Manuel.},
	title = {Efecto del estrés hidrico sobre el sistema simbiótico Rhizobium-frijol},
	publisher = {El autor,},
	year = {1990},
	address = {Chapingo, Méx. :},
	note = {41-87}
}