Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Heating layout: second floor plan (1/4" = 1'-0")

Photomechanical print with graphite on paper

Photomechanical print in black, gray, and green

Photomechanical print with graphite and colored pencil on paper

Photomechanical print in black ink

Photomechanical print in black and brown ink