http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aeromagnetic maps of the Colorado River region including the Kingman, Needles, Salton Sea, and El Centro 1?x 2?quadrangles, California, Arizona, and Nevada
Colorado River region, aeromagnetic maps
6 maps on 3 sheets ; 67 x 75 cm. or smaller, sheets 144 x 101 cm. or smaller, folded in envelope 30 x 24 cm.
Department of the Interior, U.S. Geological Survey ; by John Mariano and V.J.S. Grauch.
Includes text, bibliographies, figures, and quadrangle location maps.
Miscellaneous field studies ; map MF-2023