http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
178 pages : illustrations, maps, charts (some folded in pocket) ; 28 cm.
Billings Geological Society ; Frank P. Sonnenberg, editor.
Third annual field conference held September 4, 5, 6, 7, 1952.
Field conference guidebook (Montana Geological Society) ; 3