You should check out the underground press collection at the Wisconsin Historical Society. You will find relevant materials in both the library catalog and the archives catalog if you search for the term "underground press" and then limit your results to, say 1960 to 1975. You'll find the links to the catalogs on this page. The periodicals librarian at the Society, James Danky, is very knowledgeable about the underground press and would likely be of great help to you in your project.


You might also see what sort of archive the UW-M student newspaper, The Daily Cardinal has.


Please let us know if this is not the kind of information you were looking for. Thanks!