1. Spatial distribution of selenium and other inorganic constituents in ground water underlying a drained agricultural field, western San Joaquin Valley, California Author/Creator: Leighton, David A., author Publication/Creation: Sacramento, California : U.S. Geological Survey, 1992 Resource Type: Book Access & Availability: Loading
2. Summary of the San Juan structural basin regional aquifer-system analysis, New Mexico, Colorado, Arizona, and Utah Author/Creator: Levings, Gary W., author Publication/Creation: Albuquerque, New Mexico : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading