@book{18599,
	author = {Buitrago Giraldo, Wilson Hernando },
	title = {El Eslabón perdido : },
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {2015.},
	address = {Bogotá (Colombia) :},
	url = {https://drive.google.com/open?id=1D_6mZC8RJg3uwQ97Uy-rsgIzW_7yuHha}
}