Research Project on Economical Apartment Design, 1930: Building type IIb: basement plan, 1:50

Black ink on tan wove paper

Black marker on paper

Graphite on paper

Blue and green crayon on paper

Colored marker, black pen, and blue pen on paper

Black crayon on envelope

Black crayon on paper

Graphite and colored pencils on paper

Graphite on paper

Red marker and watercolor on paper

Black crayon on paper and mounted

Black crayon on paper