@article {1511,
	title = {Una Investigacion Arqueologica de los Sitios Cerros con Trincheras del Arcaico Tardio en Chihuahua, Mexico: Las Investigaciones de Campo de 1997},
	year = {1998},
	note = {id: 242},
	month = {1998},
	institution = {University of Texas, Center for Archaeological Research},
	author = {Hard, R. and Roney, J.}
}
