http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Conference on Water, April 22-24, 1975
National Conference on Water, (1975 : Washington, D.C.)
National Conference on Water (1975 : Washington, D.C.)
vi, 229 pages : illustrations, charts ; 29 cm.