Research Project on Economical Apartment Design, 1930: Building type IIb: east elevation, 1:50

Photomechanical print in black ink on white paper

Photomechanical print in red, black and blue inks on paper

Photomechanical print with graphite and red pencil on paper

Photomechanical print in colored inks on white wove paper

Typewritten text on paper