Best reference for mineralogy is William Cordura (1998) "Wisconsin Mineral Locality Index" Rocks & Minerals 73:378-399.
Also see https://falconfile.uwrf.edu/home/W1014120/personalweb/WiscMin.html in which Bill refers to the above reference as a 'shorter version' of the information on his website. As at 25th August 2008, the website states that it is a list of minerals reported up to August 2007.