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

Graphite on paper

Colored marker on paper

Ink on vellum

Colored crayons on paper

Graphite and charcoal on off-white wove paper

Black crayon on paper

Graphite on paper

Graphite on paper

Black, brown and blue crayon on paper

Colored marker and blue pen on paper

Colored marker and black pen on paper

Colored crayons on paper