Building Addition and Alterations, Philadelphia, 1944-1946: Plan, sections and details

Photomechanical print with graphite on paper

Photomechanical print with graphite and colored pencil on paper

Photomechanical print in black ink on paper

Photomechanical print with ink on paper

Photomechanical print in black ink on paper

Photomechanical print in ink with colored pencil on paper

Photomechanical print with handcoloring