http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Surface water supply of the United States, 1921
1 online resource (vi, 294 pages) : illustrations.
Issued also as House doc. numbers 37, 68th Cong., 1st sess.
Prepared in cooperation with the states of Maine, New Hampshire, Vermont, Massachusetts, Connecticut, New York, New Jersey, and Pennsylvania.
Surface water supply of the United States, 1921. Part 1, North Atlantic slope drainage basins
Water-supply paper (Washington, D.C.) ; no. 521