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Kahn, Louis Isidore. Alfred Newton Richards Medical Research Building and Biology Building, University of Pennsylvania, Phidadelphia, Pennsylvania, Plan, 1957. Crayon, graphite and colored pencil on tracing paper, 21 5/8 x 23 1/2" (54.9 x 59.7 cm). Gift of the architect, 364.1967. (Photo: MoMA)