http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Energetic, ecological, and cultural factors in economic strategies in southern Tunisia
Microfilm. Ann Arbor, Mich. : University Microfilms International, 1980. 1 microfilm reel ; 35 mm.
Ph. D. Pennsylvania State University 1979.