1. Allen, James P., and Eugene J. Turner. 1988. We the People: An Atlas of America’s Ethnic Diversity. New York: Macmillan.
2. Anderson, Cory, and Loren Kenda. 2015. What Kinds of Places Attract and Sustain Amish Populations? Rural Sociology 80 (4): 483–511.
3. Bastian, Robert W. 1975. Southeastern Pennsylvania and Central Wisconsin Barns: Examples of Independent Parallel Development? Professional Geographer. 27 (2): 200–204.
4. Bawden, Timothy. 1996. Milwaukee’s German Renaissance Landscape, 1890–1918. Paper presented at annual meeting of Wisconsin Geographical Society, Oshkosh, Wisconsin, Oct 12.
5. ———. 2006. A Geographical Perspective on Nineteenth-Century German Immigration to Wisconsin. In Wisconsin German Land and Life, ed. Heike Bungert, Cora Lee Kluge, and Robert C. Ostergren, 79–91. Madison: Max Kade Institute for German-American Studies, University of Wisconsin.