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Canada | |
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| Sabina, Ann P., 2000. Rocks and Minerals for the Collector: Cobalt-Belleterre-Timmins, Ontario and Quebec, GSC. Miscellaneous Report 57, 266 p. |
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Norway | |
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| Knut Edvard Larsen collection |
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USA | |
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| Clark, L.D. (1954), Geology and mineral deposits of the Calaveritas quadrangle, Calaveras County, California: California Division Mines Special Report 40: 17; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 67; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 396. |
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| Logan, Clarence August (1950), Mines and mineral resources of Madera County, California: California Journal of Mines and Geology: 46: 450; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 396. |
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| Short, Allan McIlroy (1933), A chemical and optical study of Piedmontite from Shadow Lake, Madera County, California: American Mineralogist: 18: 493-500; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 396. |
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| Waring, Clarence A. (1919), Butte, Placer, Sacramento, Yuba Counties: California Bureau of Mines Report 15: 321; Root, L.L. (1927) Twenty-third report of the State Mineralogist. California Mining Bureau Report 23, 456 pp.: 237; Wiebelt, F.J. and Smith M.C. (1959) A reconnaissance of asbestos deposits of the serpentine belt of northern California. U.S. Bureau of Mines Report of Investigation 7860, 52 pp.: 23; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 398. |
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| Logan, Clarence August (1943), Current mining activity in Plumas County: California Division Mines Report39: 85-87; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 67. |
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| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 68; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 398. |
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| Logan, Clarence August (1929), Sierra County, Colusa County: California Mining Bureau. Report 25: 154; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 399. |
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| Goodwin, Joseph Grant (1958), Mines and mineral resources of Tulare County, California: California Journal of Mines and Geology: 54(3): 371, 463; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 399-400. |
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| O’Brien, J.C. (1952a), Mines and mineral resources of Yuba County, California: California Journal of Mines and Geology: 48: 156; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 400. |