http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Ground-water levels in the United States, 1956-57, Northeastern States
1 online resource (v, 144 pages) : maps.
prepared under the direction of Philip E. LaMoreaux.
"Prepared in cooperation with the States of Connecticut, Delaware, Indiana, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, and Rhode Island, and with other agencies."
Geological Survey water-supply paper ; 1537