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USA | |
| Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b |
| Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b Jones, T.A. (1948), barite deposits in the Ouachita Mountains, Montgomery, Polk, and Pike Counties, Arkansas, US Bur. Mines Rept. Inv. 4348. |
| Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b Jones, T.A. (1948), barite deposits in the Ouachita Mountains, Montgomery, Polk, and Pike Counties, Arkansas, US Bur. Mines Rept. Inv. 4348. |
| Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b Jones, T.A. (1948), barite deposits in the Ouachita Mountains, Montgomery, Polk, and Pike Counties, Arkansas, US Bur. Mines Rept. Inv. 4348. |
| Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b Jones, T.A. (1948), barite deposits in the Ouachita Mountains, Montgomery, Polk, and Pike Counties, Arkansas, US Bur. Mines Rept. Inv. 4348. |