Mica and beryl pegmatites in Idaho and Montana. : A description of mines and prospects examined in each district, some illustrated by maps and structure sections.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off,
1950.
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| Series: | Professional paper (Geological Survey (U.S.)) ;
229. |
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| Physical Description: | v, 64 pages : illustrations, maps (8 folded in pocket) ; 29 cm. |
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