@book{9467,
	author = {Huffman Schwocho, Dennis Paul. and Victorino Ramírez, Liberio.},
	title = {Programa institucional de investigación educativa (PIIE)},
	publisher = {UACH. Departamento de Preparatoria Agrícola,},
	year = {1991},
	series = {Cuadernos de formación de investigadores},
	address = {Chapingo, Méx. :}
}