Published Biographical References

• American Art Annual. v.21 (1924/25) "Who's Who In Architecture.", p. 392
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  Office: 1309 Locust St., Philadelphia, PA
   
• AIA/T-Square Yearbook, p. 131, 1896
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• AIA/T-Square Yearbook, p. 140, 1910
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• AIA/T-Square Yearbook, 1931
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  Membership: T-Square Club, Life
   
• AIA/T-Square Yearbook, 1931
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  Membership: Philadelphia Chapter, AIA, Member
   
• AIA/T-Square Yearbook, 1949
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  Membership: Philadelphia Chapter, AIA, Corporate Member
   
• Macleod, Cynthia, "Arts and Crafts Architecture in Suburban Philadelphia Sponsored by Dr. George Woodward," M.A. Thesis, University of Virginia, 1979.
   
• Obituary: Michigan Society of Architects. Monthly Bulletin 27 (September 1953): 25; New York Times (20 July 1953)
   
• University of Pennsylvania. Architectural Alumni Society. The Book of the School. Philadelphia: University of Pennsylvania Press. 1934, p.152.
   
• University of Pennsylvania. General Alumni Catalogue. Philadelphia: 1917, p. 148.
   
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Biographical Drawings, Photos, Papers, etc.

• "The Powel House" George Roberts Papers, Historical Society of Pennsylvania (photocopied typescript in Roberts biography file, Athenaeum of Philadelphia, includes a description of Duhring's office in 1930)
   

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