Optical Calcite Deposits in Park and Sweet Grass Counties, Montana Contributions to Economic Geology. by United States Geological Survey Published in 1956, s.n (S.l) Optical Calcite Deposits in Park and Sweet Grass Counties, Montana United States Geological Survey Change Cover Contributions: Stoll, W.C., Armstrong, F.C. works: Optical Calcite Deposits in Park and Sweet Grass Counties, Montana Series: U.S. Geological Survey bulletin -- 1042M Language: English
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