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

Colored crayons on paper

Graphite on off-white wove paper

Black crayon on paper

Black crayon and colored crayon patches on paper

Colored marker and watercolor on paper

Graphite on paper

Black marker on paper

Graphite on paper

Graphite on paper

Graphite on paper

Colored marker and black pen on paper

Black and colored crayons on paper