http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aerial radiometric contour maps of surface concentrations of uranium, potassium and thorium in Ohio
3 maps ; 83 x 76 cm., sheets 105 x 81 and 112 x 81 cm., folded in envelope 30 x 24 cm.
Department of the Interior, U.S. Geological Survey ; by Joseph S. Duval ; prepared in cooperation with the Ohio Geological Survey.
Geophysical investigations (Geological Survey (U.S.)) ; map GP-968