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

Charcoal on off-white laid paper; verso: graphite

Graphite and watercolor on gray-blue laid paper

Graphite on off-white wove paper

Graphite on paper

Black ink on cream wove paper

Gray wash on cream laid paper, mounted to dark brown wove paper

Watercolor over graphite on off-white laid paper

Crayon on paper

Black ink and charcoal on cream laid paper

Colored crayon and chalk on tan laid paper

Black ink on off-white wove paper

Black ink on off-white wove paper