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

Black ink with extensive scratchwork on white scratchboard

Black ink and colored chalk on translucent buff wove paper

Watercolor, gouache and black chalk on off-white wove paper mounted on cardboard

Black ink over graphite on cream board

Charcoal on off-white laid paper

Black chalk and black crayon on pink laid paper

Graphite on off-white wove paper

Black ink on cream wove paper

Graphite on off-white wove paper

Graphite on paper

Graphite, gouache, black ink and typing on white wove paper

Ink on paper