Prefabricated Copper Houses, 1931-1932: Building type S: wall framing details 1:10

Ink, graphite and colored crayons on paper

Graphite on paper

Black ink on paper

Graphite with crayon on paper

Black crayon on paper

Silverpoint

Black and red marker and black pen on paper

Black and red marker on paper

Black and red marker on paper

Ink on paper

Graphite on paper

Graphite and colored pencils on paper