http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and phosphate deposits of the Permian rocks in central western Montana
iv, 779-883, iii pages : illustrations ; 30 cm.
Descriptions of Permian rocks and of structure of enclosing rocks at north end of western phosphate field, with measured sections, chemical analyses, and phosphate resource tables.
"Work done partly on behalf of the U.S. Atomic Energy Commission."
Part of illustrative matter fold. in pocket.
Geological Survey professional paper ; 313-F
Geology of Permian rocks in the western phosphate field