United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the research division of the College of Agricultural and Life Sciences, University of Wisconsin
Includes bibliographical references (pages 153-154).
Mode of access: Internet from the USDA web site. Address as of 6/02/2008: http://soildatamart.nrcs.usda.gov/Manuscripts/WI093/0/Pierce%5FWI.pdf; current access available via PURL.