@book{439,
	author = {Allendoerfer, Carl B. and Oakley, Cletus O.},
	title = {Fundamentos de matemáticas universitarias},
	publisher = {McGraw-Hill},
	year = {1968},
	address = {Madrid :},
	edition = {2a. ed.},
	url = {https://t1.gstatic.com/images?q=tbn:ANd9GcTLqThDzykSlP2N9U9ph28vsJ0yaa7TtDGl9bVaUG6tOXr7a7FxIA}
}