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University of Minnesota Duluth – Microbial Source Tracking
University of Minnesota – E. Coli source tracking by Rep-PCR DNA Fingerprinting
US Geological Survey –
Ishii et al. 2005. Presence and Growth of Naturalized Escherichia coli in Temperate Soils from Lake Superior Watersheds (418 KB pdf)
Kenzie Kellie. 2005. Do the presence of local factors (people and their activities, animals, birds, non-motorized, and motorized boats) as well as environmental factors (temperature, wind, waves, and water clarity) influence bacteria counts (E. coli and fecal coliforms) at four Minnesota Park Point beaches on Lake Superior? (download 74 KB pdf)