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

Colored marker on paper

Ink and applied type on paper, spatter-painted

Ink with applied type on paper

Colored marker on paper

Graphite on paper

Colored marker and felt-tipped pen on paper

Black crayon on paper

Black marker on paper

Graphite on paper

Graphite on paper

Graphite on paper

Charcoal on beige wove paper