| USA | | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Spencer, Jon (1983), Helium resources and production in Arizona: Fieldnotes, Vl. 13, No. 2: 6-7, 15-16; Peirce, H.W. (1990), AZ Geol. Sur. Industrial Minerals card file. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, K., AZ Bur. Mines Bul. 182: 175. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Peirce, K.W., AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Peirce, .W. and J.R. Scurlock (1972), Arizona well information, AZ Bur. Mines Bull. 185; Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182; Peirce, H.W. (1990), AZ Geol. Sur. Industrial Minerals card file. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 176. | |
| Peirce, K.W., AZ Bur. Mines Bull. 182: 176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:176. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 166. | |
| Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 183. | |
| Peirce, H.W., S.B. Keith and J. C. Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:183. | |
| AZ Dept. Min. Resources Pinedale Coal file. | |
| Spencer, Jon (1983), Helium resources and production in Arizona: Fieldnotes, Vl. 13, No. 2: 6-7, 15-16; Peirce, H.W. (1990), AZ Geol. Sur. Industrial Minerals card file. | |
| UGMS Bull 117 Minerals and Mineral Localities of Utah | |
| UGMS Bull 117 Minerals and Mineral Localities of Utah |
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