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

Charcoal on off-white laid paper

Black crayon on paper

Ink sketches on commercially lined paper

Graphite and black crayon with touches of white chalk on tracing paper

Watercolor and white gouache on cream wove paper

Graphite on off-white wove paper

Graphite on paper

Charcoal on off-white laid paper

Graphite on heavy cream wove paper

Watercolor and graphite on off-white wove paper

Brown ink over graphite on off-white laid paper

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