http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
vi, 135 pages : 29 plates (maps, 1 folded) ; 28 cm.
Compiled by Work projects administration, Mineral resources survey. (O.P. 65-1-91-24 W.P. 2986) In cooperation with the Mining association of Montana.
At head of title: State of Montana, Bureau of mines and geology, Francis A. Thomson, director ...
Some plates accompanied by descriptive letterpress.
Montana. State bureau of mines and geology. Memoir ; no. 20