TY - RPRT TI - Effects of natural and human factors on groundwater quality of basin-fill aquifers in the southwestern United States: Conceptual models for selected contaminants AU - Laura M. Bexfield AU - Susan A. Thiros AU - David W. Anning AU - Jena M. Huntington AU - Tim S. McKinney PY - 2011 DO - 10.3133/sir20115020 UR - https://pubs.usgs.gov/publication/sir20115020 ID - sir20115020 ER -