Research Project on Economical Apartment Design, 1930: Table for heating installation

Ink on vellum

Black and colored crayons on paper

Blue and red crayon on paper

Graphite on paper

Graphite on paper

Black and red marker and black pen on paper

Colored marker on paper

Graphite and colored chalk on paper

Colored marker, black ink, b/w photocopy, and adhesive on paper

Graphite on paper

Graphite on paper

Red marker and graphite on paper