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Koyl, George. American Architects' Directory. New York: R.R. Bowker Co.,
p. 407, 1956
Links:
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Office: Philadelphia
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Koyl, George. American Architects' Directory. New York: R.R. Bowker Co.,
p. 516-517, 1962
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Office: Philadelphia
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Koyl, George. American Architects' Directory. New York: R.R. Bowker Co.,
p. 670, 1970
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Office: Philadelphia
- Obituary: Philadelphia Inquirer - 22 October 1996.
- Philadelphia Chapter AIA Membership Records. (The Athenaeum of Philadelphia)
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