Nutrient concentrations and their relations to the biotic integrity of wadeable streams in Wisconsin [electronic resource] / by Dale M. Robertson ... [et al.] ; in cooperation with the Wisconsin Department of Natural Resources.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2006.
Mode of access: Internet from the USGS web site. Address as of 7/29/08: http://pubs.usgs.gov/pp/pp1722/pdf/PP%5F1722.pdf; current access is available via PURL.
