Published Biographical References

• Koyl, George. American Architects' Directory. New York: R.R. Bowker Co., 1962
  Links: View citation information
  Office: Philadelphia
   
• Koyl, George. American Architects' Directory. New York: R.R. Bowker Co., 1970
  Links: View citation information
  Office: Philadelphia
   
• Obituary. Philadelphia Inquirer (February 3, 2013).
   

Biographical Drawings, Photos, Papers, etc.

• Biographical Files, Architectural Archives, University of Pennsylvania.
   

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