@book{50011,
	author = {Villarreal Orozco, Roberto D.},
	title = {Estudio agroeconómico y social del ejido Santa Cruz de Ciénega del Toro, en Galeana, N.L.},
	publisher = {El autor,},
	year = {1971},
	address = {Monterrey, N.L. :}
}