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

Colored marker on paper

Graphite on paper

Black crayon on paper

Colored marker and black pen on paper

Graphite on paper

Colored crayons on paper

Graphite on paper

Purple crayon on paper

Colored crayon on paper

Graphite on paper

Ink and gelatin silver prints mounted to paper

Colored marker on paper