@book{68635,
	author = {Balderas Ramírez, Roberto. and Castillo Nieves, Armando.},
	title = {Descripción del estrato herbáceo del predio Alta Siberia Municipio de Texcoco},
	publisher = {El autor,},
	year = {1988},
	address = {Chapingo, Méx. :},
	note = {31-26}
}