http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Mean annual runoff in the upper Ohio River basin, 1941-70, and its historic variation
iv, 32 pages : illustrations, maps (1 map, 1 table in pocket) ; 23 cm.
Geological Survey water-supply paper ; 2042