Research Project on Economical Apartment Design, 1930: Building type IIIb: foundation plan, 1:50

Green and purple crayon on paper

Watercolor on paper

Black marker, black pen, paper, and adhesive on paper

Black crayon on paper

Blue pen on notecard, black pen on postal receipt, adhesive, and black pen on paper

Ink and wash on paper

Colored marker on paper

Colored marker and black pen on paper

Black crayon on paper

Graphite on paper

Black and blue pen on paper

Blue ink on lined notebook paper