Research Project on Economical Apartment Design, 1930: Ia, Ib, IIb, IIIb: plans

Blue marker on paper

Colored crayons on paper

Colored marker on paper

Colored marker on paper

Graphite on paper

Black ink on thin cream wove paper

Black marker on paper

Red marker on paper

Brown, blue and green crayon on paper

Black and aqua marker on paper

Black and colored crayons on paper

Pastel on composition board