Published Biographical References

• Koyl, George. American Architects' Directory. New York: R.R. Bowker Co., 1962
  Links: View citation information
  Office: Villanova, Philadelphia
   
• Koyl, George. American Architects' Directory. New York: R.R. Bowker Co., p. 899, 1970
  Links: View citation information
  Office: Lewis Tower Building, Philadelphia
   
• Obituary: Philadelphia Inquirer - 1 December 2000.
   

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