Office and Factory Buildings, Cali, Colombia, 1945: Office unit: plans, elevations, details (1 1/2" = 1'-0")

Watercolor on off-white wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

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

Charcoal on off-white laid paper

Graphite on thin off-white wove paper

Oil on composite board

Black ink and black wash on off-white wove paper

Crayon on paper

Graphite on white wove paper

Black ink over graphite on thin tracing paper, mounted to off-white cardboard

Black ink on off-white wove paper