Mica and beryl pegmatites in Idaho and Montana
Subtitle: A description of mines and prospects examined in each district, some illustrated by maps and structure sections.
Series: Geological Survey professional paper 229
Publisher: U.S. Govt. Print. Off.
Published: 1950
Place of publication: Washington
Language: eng
Number of pages: 64
Subjects: Mica; Beryl; Pegmatites