http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Isopach maps, perspective projections, and correlation diagrams of the Paleocene Flowers-Goodale coal resource unit in the northern Powder River Basin, Birney and Broadus 30ʹ x 60ʹ quadrangles, Montana-Wyoming
2 maps on 1 sheet : color ; 56 x 131 cm. and 38 x 68 cm., sheet 105 x 137 cm. + 1 sheet (104 x 68 cm.), folded in envelope 30 x 24 cm.
Department of the Interior, U.S. Geological Survey ; by Laura R.H. Biewick and Marguerite W. McLellan.
Relief shown by contours and spot heights.
Includes text, bibliography, and index map.