Office and Factory Buildings, Cali, Colombia, 1945: Office unit: plan, elevations, section (1/16" and 1/8" = 1'-0")

Watercolor over graphite on off-white wove paper

Watercolor, black ink, and metallic paint over graphite on buff wove paper

Graphite on paper

Colored crayons on paper

Black ink, charcoal, watercolor, and watercolor pencil on cream laid paper, edges taped

Graphite on paper

Charcoal on off-white laid paper

Charcoal on heavy blue wove paper

Black ink and white gouache on cream wove paper

Charcoal on off-white laid paper

Black ink on off-white wove paper, mounted to tissue, mounted to an index card, taped to off-white cardboard.

Black ink, graphite, and yellow chalk on off-white wove paper