Peterson, D.L., 1968, Bouger gravity map of parts of Maricopa, Pima, Pinal, and Yuma Counties, Arizona: U.S. Geological Survey Geophysical Investigations Map GP-0615, 1 sheet, scale 1:250,000.
Peterson, D.L., 1968, Bouger gravity map of parts of Maricopa, Pima, Pinal, and Yuma Counties, Arizona: U.S. Geological Survey Geophysical Investigations Map GP-0615, 1 sheet, scale 1:250,000.
Gravity Survey, Geophysical Survey,