Boys' pre-camp medical examination form (Camp Co-op-a-gan, Perch Lake, northern Minnesota) to be filled out by parents or guardians and physicians conducting medical examinations three days prior to camp.
University of Minnesota Libraries, Immigration History Research Center Archives
A list of resorts in Minnesota, Wisconsin and Canada who have noted "restricted" or "selected" clientele as well as "gentiles only" in their current resort brochures. The first page is dated 1946 and other pages are stamped July 19, 1947.
University of Minnesota Libraries, Nathan and Theresa Berman Upper Midwest Jewish Archives