http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Iowa Agriculture and Home Economics Experiment Station
Department of Agriculture and Land Stewardship.
1 volume : illustrations (some color), maps (some color) ; 31 cm. + 30 maps.
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with Iowa Agriculture and Home Economics Experiment Station and Cooperative Extension Service, Iowa State University; and Division of Soil Conservation, Iowa Department of Agriculture and Land Stewardship.
Fifty-eight maps on 30 folded sheets laid in.
Also available via Internet from the NRCS web site. Address as of 6/19/07: http://soildatamart.nrcs.usda.gov/Manuscripts/IA013/0/BlackHawk_IA.pdf; current access via PURL.
Includes bibliographic references (pages 121-122).