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

Graphite on paper

Graphite on gray wove paper

Charcoal and graphite on off-white laid paper

Sketchbook with brown cloth-covered cardboard covers

Watercolor over graphite on off-white wove paper

Transparent and opaque watercolor on off-white wove paper

Ink on paper

Watercolor and white gouache over graphite on off-white card

Watercolor and graphite on white wove paper

Sketchbook with blue- and black-fabric-covered cardboard covers

Graphite powder and incised lines on Japanese paper

Graphite on off-white wove paper