@book{118480,
	author = {Garcia de Leon Gonzalez, Porfirio and Garcia de Leon Campero Calderon, Porfirio,introd.},
	title = {Universidad y ciencia /},
	publisher = {UMSNH,},
	year = {c1992},
	address = {Morelia, Mich., Mex. :},
	edition = { ed.}
}