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

Oil on green prepared paper

Black crayon on thin buff wove paper

Black ink over graphite on cream paper mounted to board

Colored crayon with scratchwork on off-white illustration board

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Charcoal on off-white laid paper

Charcoal on beige laid paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Charcoal and graphite (fixed) on off-white wove paper

Brown chalk on darkened off-white wove paper

Black ink, blue ball-point, graphite, and red pencil on off-white wove paper