Haack, SK, Wilson, JS, Woodhams, SM, Long, DT, Pijanowski, BC, Boutt, DF, Hyndman, DW, (1999), Abundance, dissemination, and diversity of Escherichia coli in a watershed in northern Michigan, USA In Wilde, FD, Britton, LJ, Miller, CV,and Kolpin, DW, compilers, 2000, Effects of animal feeding operations on water resources and the environment–proceedings of the technical meeting, Fort Collins, Colorado, August 30-September 1, 1999: US Geological Survey Open-File Report 00-024, 107 p