- Donald M. Aucutt, “Ottenheimer in the U.P.,” Prairie. 1, No. 4 (July-September 2003): 9. Rochelle Berger Elstein, “The Jews of Houghton-Hancock and Their Synagogue,” Michigan Jewish History, 38 (November 1998): 2-10.
- Society of Architectural Historians. 3/19/2006. “American Architect Biographies, Ottenheimer, Henry L.
- Aucutt, 9.
- Aucutt, 10-11.
- Aucutt, 11. Henry L. Ottenheimer obituary, New York Times, 11 May 1919.
- Historic Houghton, “James Dee Block,” sign outside building, Isle Royale Street.
- Gundlach Collection, 85A, MTU Archives. “James Dee Block” sign.
- Gundlach Collection, 85AN, MTU Archives.
- "The New Douglass House Will Open Its Doors Tomorrow," Copper Country Evening News, 3 August 1900.
- "The New Douglass House."
- "The New Douglass House."
- "The New Douglass House."
- "The Shelden-Dee Block," Copper Country Evening News, 6 June 1899.
- Clarence S. Monette, Early South Range (privately printed), 69.
- Photograph in Monette, 71.
- Gundlach Collection, 85K, MTU Archives.
- “Leopold Building Now Completed,” Daily Mining Gazette, 14 November 1903.
- Gundlach Collection, 85E, MTU Archives.
- Aucutt, 8.
- Gundlach Collection, 85H, MTU Archives.
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