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

Graphite on paper

Black ink, black crayon, and graphite on off-white cardboard

Charcoal on cream wove paper

Watercolor over graphite on off-white wove paper

Crayon on paper

Watercolor, black ink, metallic paint over graphite on cream wove paper; verso of sheef affixed to album leaf: graphite; verso of album leaf: graphite

Graphite on paper

reproduction of a red chalk drawing

Watercolor and colored pencil on off-white wove paper

Graphite on beige wove paper

Watercolor and graphite on white wove paper

Black ink and gray wash on off-white wove paper