[William Penn High School] [Philadelphia Board of Education] plan of second floor and section (Mitchell/Giurgola, architects) Mitchell / Giurgola (Philadelphia Office) Collection, Architectural Archives, University of Pennsylvania. Local ID #: aaup.015.V.072.2
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[William Penn High School] [Philadelphia Board of Education] perspective (Romaldo Giurgola, delineator) Mitchell / Giurgola (Philadelphia Office) Collection, Architectural Archives, University of Pennsylvania. Local ID #: aaup.015.V.072.1
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[William Penn High School] [Philadelphia Board of Education] plan of first floor (Mitchell/Giurgola, architects) Mitchell / Giurgola (Philadelphia Office) Collection, Architectural Archives, University of Pennsylvania. Local ID #: aaup.015.V.072.3
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