http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Surface water supply of the United States, 1950
prepared under the direction of C.G. Paulsen.
"Prepared in cooperation with the States of Illinois, Indiana, Kentucky, Maryland, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia and other agencies."
Surface water supply of the United States, 1950. Part 3, Ohio River Basin
Geological Survey water-supply paper ; 1173