Prefabricated Copper Houses, 1931-1932: Building types S, S1: window details, 1:1

Black crayon on paper

Graphite on paper

Colored marker on paper

Colored marker on paper

Colored crayons ; graphite and colored crayons on paper

Graphite and colored pencils on paper

Red pen and graphite on paper

Black marker on paper

Black crayon on paper

Graphite on paper

Graphite on paper

Graphite on paper