Research Project on Economical Apartment Design, 1930: Plans of floors with 3 or 4 apartments

Black crayon on paper

Colored marker and green pen on paper

Graphite on paper

Graphite and watercolor on paper

Watercolor and graphite on white wove paper

Blue and brown crayon on paper

Graphite on paper

Graphite on cream wove paper

Black marker on paper

Black ink and graphite traces on off-white wove paper

Graphite on off-white wove paper

Black and red marker on paper