- Eckert, Sandstone Architecture, 282. Frances Fredericks Maass, "My Family History" (1917), manuscript school paper, Keweenaw Historical Society Collection 43, Box 11, Folder 8, MTU Archives.
- 1910 and 1920 censuses. “Questionnaire for Architects’ Roster and/or Register of Architects Qualified for Federal Public Works,” May 1, 1946, American Institute of Architects Archives.
- Copper Country Evening News, 27 July 1907.
- Michigan Contractor and Builder 6, No. 2 (6 July 1912): 14.
- Michigan Contractor and Builder 7, No. 14 (19 September 1914): 8.
- Michigan Contractor and Builder 6, No. 17 (19 October 1912): 12; 6, No. 19 (2 November 1912): 15; 6 No. 29 (11 January 1913): 10; 6, No. 31 (25 January 1913): 13; 6, No. 33 (8 February 1913): 4; 6, No. 35 (22 February 1913): 5; 6, No. 42 (12 April 1913): 12; 6, No. 42 (12 April 1913): 12.
- The full text of this informative note, obviously written by Maass, reads: “Architect Charles W. Maass, for the last four years located in Houghton, has left for Seattle, Washington, with his family, and expects to make his permanent home in that city. Mr. Maass was a resident of the copper country for 18 years. He spent nine years of that time as architect in the office of the Calumet & Hecla Mining Company. He later engaged with his brother, Fred Maass, in the general practice of his profession at Laurium, and four years ago the firm moved to Houghton. Fred Maass recently located in the iron country. Mr. Maass leaves in the copper country many examples of his professional work, having done the bulk of the architecture of the district for some years past.” Michigan Contractor and Builder 6, No. 43 (19 April 1913): 15.
- Eckert, Sandstone Architecture, 282.
- Gundlach Collection, 86U, MTU Archives.
- Gundlach Collection, 86S, MTU Archives.
- In “Houses and Churches” folder, C&H Drawings collection, MTU Archives.
- “Questionnaire for Architects’ Roster and/or Register of Architects Qualified for Federal Public Works,” May 1, 1946, American Institute of Architects Archives.
- Copper Country Evening News, 18 March 1898.
- Copper Country Evening News, 10 May 1898.
- “Mr. Hermann’s New Building,” Copper Country Evening News, May 27, 1898.
- “An $8,000 Residence,” Copper Country Evening News, 28 October 1899.
- “An $8,000 Residence,” Copper Country Evening News, 28 October 1899.
- History of the Vertin Building, 2005, Vertin Gallery, 31 July 2006.
- History of the Vertin Building, 2005, Vertin Gallery, 31 July 2006.
- “Will Erect Another Block,” Daily Mining Gazette 23 December 1905.
- Research by Dave Sprenger, personal communication, 2008.
- “New Block Going Up,” Copper Country Evening News, 14 April 1905.
- “New Block Going Up,” Copper Country Evening News, 14 April 1905.
- “Calumet Bank in New Quarters,” Daily Mining Gazette, 2 December 1906.
- The attribution of this house to Maass appeared in an advertisement for asbestos shingles that appeared in House and Garden 10 (July-December 1906). The ad is on page 15, but it is uncertain, due to the binding, which issue it appeared in. The volume is available through Google books.
- 1900 and 1910 censuses. Polk Directories.
- Bessie Phillips, “1962 Marks Anniversary of the Closing of Region’s Big Tamarack Store Enterprise,” Daily Mining Gazette, 3 October 1962. Larry Lankton, Cradle to Grave: Life, Work, and Death in the Lake Superior Copper Mines (New York: Oxford, 1991), 167.
- Forrest Crissey, “Every Man His Own Merchant,” Saturday Evening Post, 20 September 1913, 16ff.
- Bessie Phillips, “1962 Marks Anniversary of the Closing of Region’s Big Tamarack Store Enterprise,” Daily Mining Gazette, 3 October 1962.
- “Remodelled Tamarack Store Almost Complete,” Daily Mining Gazette, 21 July 1907.
- A perspective drawing of the building, attributing the building to Maass Brothers Architects” and “Built by W. F. Milford,” hangs in the building today.
- Polk Directories.
- "To Start Work Soon on New Croatian Building," Daily Mining Gazette, 11 July 1907.
- “New Weir Residence Ready for Occupancy,” Daily Mining Gazette, 29 December 2007.
- “New Weir Residence Ready for Occupancy,” Daily Mining Gazette, 29 December 2007.
- "Three Beautiful Laurium Homes," Daily Mining Gazette, 11 May 1907.
- "Three Beautiful Laurium Homes," Daily Mining Gazette, 11 May 1907.
- “Two Fine Homes for Laurium,” Daily Mining Gazette, 23 December 1906. “Three Beautiful Laurium Homes,” Daily Mining Gazette, 11 May 1907.
- "Three Beautiful Laurium Homes," Daily Mining Gazette, 11 May 1907.
- “Two Fine Homes for Laurium,” Daily Mining Gazette, 23 December 1906.
- Laurium Manor Inn, 13 October 2005, 31 July 2006.
- Gundlach Collection, 87C, MTU Archives.
- Gundlach Collection, 87C, MTU Archives.
- Rochelle Berger Elstein, “The Jews of Houghton-Hancock and Their Synagogue,” Michigan Jewish History 38 (1998): 4.
- 75th Anniversary Temple Jacob pamphlet. Elstein, "The Jews of Houghton-Hancock."
- 75th Anniversary Temple Jacob pamphlet.
- Invoice from Maass, 5 January 1912, Temple Jacob.
- Michigan Contractor and Builder 5, No. 38 (16 March 1912): 10, 5 No. 42 (13 April 1912): 4, 5 No. 48 (25 May 1912): 4.
- 75th Anniversary Temple Jacob pamphlet.
- “New Chassell School,” Daily Mining Gazette, 16 May 1912.
- Clarence J. Monette, Laurium, Michigan’s Early Days (privately printed, 1986), 35-42.
- Michigan Contractor and Builder, 7, No. 49 (23 May 1914): 9.
- Rezek, History of the Diocese, vol. 2.
- Notes on St. Anthony's, collection of Keweenaw National Historical Park Archives.
- Michigan Contractor and Builder 7, No. 9 (15 August 1914), 6.
- Quincy drawings collection, QD 0152-0155 (23 November 1915), QD1483 and 1484 (3 May 1916), and QD0156 (4 March 1917), MTU Archives.
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