http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aerial gamma-ray contour maps of regional surface concentrations of potassium, uranium, and thorium in Nevada
3 maps : color ; 105 x 72 cm., on sheets 111 x 78 cm., folded in envelope 30 x 24 cm.
sheet 1. Contour map showing regional concentrations of potassium -- sheet 2. Contour map showing regional concentrations of uranium -- sheet 3. Contour map showing regional concentrations of thorium.
Department of the Interior, U.S. Geological Survey ; by Joseph S. Duval.
Includes text, bibliography, and index map.
Geophysical investigations (Geological Survey (U.S.)) ; map GP-982