Source Information

Koyl, George. American Architects' Directory. New York: R.R. Bowker Co., p. 478 (1970)

View all citations from this source

Biographical Information from this Source

Cited Architects, Engineers, and Others

• Keller, Collins Stevenson, Jr. (1921-1997) (Architect)
• Carroll, Grisdale & Van Alen (fl. 1946-1973) (Architects)

Location

(6 Penn Center Plaza)
Philadelphia, PA

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