http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
volumes : illustrations (some color), color maps ; 28 cm.
Imprint varies: Washington, D.C., 1972/73-19 ; Tulsa, Okla., <1984->
Description based on: 1984; title from cover.
United States. Southwestern Power Administration.
Southwestern Power Administration, Post Office Box 1619, Tulsa, OK 74101-1619