Research Project on Economical Apartment Design, 1930: Building type IIb: isometric, steel construction. 1:10

Photomechanical print with ink and blue wash on paper

Photomechanical print in red and black inks on white paper

Photomechanical print with graphite and applied type on paper

Photomechanical print in black ink on white paper

Photomechanical print with wash and applied type on paper

Photomechanical print with gelatin silver print and applied type on paper

Typewritten text on paper