http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
2 volumes : illustrations, maps (some color) ; 28 cm.
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with United States Department of the Interior, Bureau of Land Management and Montana Agricultural Experiment Station.
"Fieldwork by Arnold N. Benson [and others]"--Volume 1, page 1.
Includes bibliographical references and indexes.