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

Graphite and crayon on paper

Black ink on off-white illustration board

Graphite on moderately textured white wove paper

Incised line and Aquarelle on white wove paper

Black ink on off-white laid paper

Graphite on off-white laid paper

Black ink and gray wash on buff wove paper, darkened

Brown ink on white wove paper

Graphite on off-white wove paper

Black chalk and charcoal on off-white laid paper

Graphite on paper

Black ink on off-white wove paper