Bilbrey, J.H., Jr., 1962, Cobalt, a materials survey: U.S. Bureau of Mines Information Circular I.C. 8103, 140 p. Authors Bilbrey, J.H., Jr. Publication Date 1962 Citation U.S. Bureau of Mines Information Circular I.C. 8103, 140 p. State AZ Province BR TR County GM PM YA Placenames Wickenburg Mts. Bagdad area Black Hills(YA) Keywords Mineral District Cobalt More Keywords Mineral District, Cobalt, AzGeoBib RefNum 938