@book{8951,
	author = {Nava Santana, Marcelo and Quijano Argomedo, María de Lourdes.},
	title = {Tesis presentadas en el Colegio de Postgraduados, 1960-1981},
	publisher = {Colegio de Postgraduados,},
	year = {1983},
	address = {Chapingo, Méx. :}
}