January, 1979
Arizona Water Resources,
vol.
79,
no.
1,
4
pp.,
Water Resources Research Center,
Tucson,
January, 1979
![](/sites/wrrc.arizona.edu/files/styles/az_natural/public/media/AWR-Jan-79_1.jpg?itok=-Y6RaTJV)
The U.S. Geological Survey (USGS) Water Resources Division has begun a comprehensive study of groundwater basins in southern Arizona, in parts of adjacent states and in Mexico.