@book{9690,
	author = {Studer, Marilyn R. and Ujfalussy F., Peter, },
	title = {Precálculo : },
	publisher = {Editorial Educativa ; Editorial Cultura Moderna, },
	year = {1991.},
	address = {Bogotá : },
	edition = {Editor en español Peter Ujfalussy F.},
	note = {Incluye índice.}
}