Prefabricated Copper Houses, 1931-1932: Building type S: rafter layout, 1:20

Black marker on paper

Graphite on paper

Black and red marker and black pen on paper

Paper

Graphite on paper

Colored marker on paper

Black and red marker on paper

Graphite on paper

Ink, graphite and colored crayons on paper

Black crayon on paper

Black marker on paper

Colored marker on paper