Tolzmann, D. H. (1993). Upper Midwest German biographical index. Heritage Books.
Chicago Style (17th ed.) CitationTolzmann, Don Heinrich. Upper Midwest German Biographical Index. Bowie, Md: Heritage Books, 1993.
MLA (9th ed.) CitationTolzmann, Don Heinrich. Upper Midwest German Biographical Index. Heritage Books, 1993.
Warning: These citations may not always be 100% accurate.