The Library has many books about Native Americans, but sometimes it can be tricky to find it since the catalog uses older terminology. For the best success, try doing a subject search for Indians of North American Wisconsin or Indians of North America and an aspect of their society you are interested in such as sovereignty. The actual name of your tribe may not be included in the catalog, but they may be included in some of the more general books about Native Americans. Since there aren't a lot of books on your topic, be nice to your fellow students and return books promptly.
Some books to check out: