http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Map showing structure contours on the top of the upper Jurassic Morrison Formation, Powder River Basin, Wyoming and Montana
1 map ; 72 x 58 cm., on sheet 91 x 104 cm., folded in envelope 30 x 24 cm.
Department of the Interior, U.S. Geological Survey ; by Bonnie L. Crysdale.
Includes text, bibliography, cross section, block diagram, stratigraphic column, and index map.
Miscellaneous field studies ; map MF-2140-C