Preliminary maps showing ground-water resources in the Lower Colorado River region, Arizona, Nevada, New Mexico, and Utah
By: by S.G. Brown.
Contributors: Geological Survey (U.S.); United States. Bureau of Reclamation.
Series: Hydrologic investigations atlas -- HA-542.
Publisher: U.S. Geological Survey
Place of publication: Reston, Va
Format: Map
Subjects: Groundwater -- Colorado River Region (Colo.-Mexico) -- Maps.
Genres: Maps.
Other titles: Lower Colorado River region, Arizona, Nevada, New Mexico, and Utah.
Notes: "Prepared in cooperation with the U.S. Bureau of Reclamation."

Includes index map and text with bibliography.