http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
shifting cultivation in a dry forest of northwest Mexico
Microfiche. Ann Arbor, Mich. : University Microfilms International, 1980. 5 microfiches ; 11 x 15 cm.
Ph. D. University of California, Berkeley 1980.