Office and Factory Buildings, Cali, Colombia, 1945: Elevations (1/16" = 1'-0")

Charcoal on blue laid paper

Black colored pencil? conte? on cream wove paper

Watercolor over graphite on off-white illustration board

Graphite on paper

Watercolor over graphite on off-white wove paper

Black crayon on paper

Sketchbook with beige cloth-covered cardboard covers

Black felt-tipped pen on yellowed newsprint paper

Opaque watercolor over graphite on tan illustration board, prepared with white ground

Crayon on paper

Black ink on off-white wove paper

Black ink on off-white wove paper