@article {,
	title = {Mapa geol{\'o}gico del cuadrangulo de Cailloma},
	year = {1988},
	publisher = {Instituto Geol{\'o}gico Minero y Metal{\'u}rgico},
	address = {scale 1:100,000},
	author = {Davila M. , David and Diaz H. , Guillermo and Montoya R. , Manuel}
}