Link to download PDF file:
1) Security, US Department of Homeland. FEMA Map Service Center. March 2011 <http://www.fema.gov/hazard/map/flood.shtm>.
2) Survey, United States Office of Coast. Historical Map & Chart Collection. March 2011 <http://historicalcharts.noaa.gov/historicals/search>.
3) Thomas, Judith C., Michelle A. Lutz, Jennifer L. Bruce, David J. Graczyk, Kevin D. Richards, David P. Krabbenhoft, Stephen M. Westenbroek, Barbara C. Scudder, Daniel J. Sullivan, and Amanda H. Bell. Water-Quality Characteristics for Selected Sites within the Milwaukee Metropolitan Sewerage District Planning Area, Wisconsin, February 2004–September 2005. Scientifi c Investigations Report 2007–5084. Reston, Virginia: U.S. Geological Survey, 2007.