@article {1515,
	title = {An Archaeological Investigation of Late Archaic Cerros de Trincheras Sites in Chihuahua, Mexico},
	year = {1999},
	note = {id: 1389},
	month = {1999},
	institution = {University of Texas, Center for Archaeological Research},
	author = {Hard, R. and Roney, J.}
}
@article {2234,
	title = {Terrace Construction in Northern Chihuahua, Mexico at 1150 B.C. and the Present},
	journal = {Journal of Field Archaeology},
	volume = {26},
	year = {1999},
	note = {id: 238},
	month = {1999},
	pages = {129-146},
	author = {Hard, R. and Roney, J. and Zapata, J. and Moses, B.}
}
@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.}
}
