These are references for mammal species in the Upper Midwest.
Minnesota are from Hazard (1982), and from the Eastern United States are from Hamilton and Whitaker (1998).
Hazard, E.B. 1982. The Mammals of Minnesota. Minneapolis, MN: University of Minnesota Press. Information on all mammal species found in Minnesota
Hamilton, W.J. and J.O. Whitaker. 1998. Mammals of the Eastern United States (3rd edition). Ithaca, NY: Cornell University Press. Information on all mammal species found in North America