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ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES, 1989, DIRECTORY OF ACTIVE MINES IN ARIZONA, INCORPORATING SAND AND GRAVEL OPERATIONS-1989-1990: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY, 14 P.EYDE, T.H., AND EYDE, D.T., 1987, BENTONITE AND SPECIALTY SAND DEPOSITS IN THE BIDAHOCHI FORMATION, APACHE COUNTY, ARIZONA, IN PEIRCE, H.W., ED., PROCEEDINGS OF THE 21ST FORUM ON THE GEOLOGY OF INDUSTRIAL MINERALS: ARIZONA BUREAU OF GEOLOGY AND MINERAL TECHNOLOGY GEOLOGICAL SURVEY BRANCH SPECIAL PAPER 4, P. 123-127.ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES, 1994, DIRECTORY OF ACTIVE MINES IN ARIZONA, INCORPORATING SAND & GRAVEL OPERATIONS -- 1994: ARIZONA DEPARTMENT MINES AND MINERAL RESOURCES DIRECTORY 42, 24 P.CIMRIEYDE AND EYDE, 1987.