‡Ref.: Welty, J.W., and Schnabel, Lorraine (1989) Bibliography for metallic mineral districts in Gila, Maricopa, Pinal, and Yavapai Counties, Arizona: Arizona Geological Survey Open-File Report 89-01, 121 p. [superseded by Welty, J.W., and others (1989), Arizona Geological Survey Circular 27].
Welty, J.W., DeWitt, Ed, and Schnabel, Lorraine (1989) Bibliography for metallic mineral districts in Gila, Maricopa, Pinal, and Yavapai Counties, Arizona: Arizona Geological Survey Circular 27, 81 p.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 405.
A county in central Arizona.
