Office and Factory Buildings, Cali, Colombia, 1945: Revisions: elevation, section (1/8" and 1/2" =1'-0")

Graphite on off-white wove paper

Graphite on paper

Graphite on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Graphite on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Ink on paper

Oil on cream laid paper

Black ink, graphite and cut and folded paper on white wove paper

Graphite on off-white wove paper

Graphite on ivory wove paper

Graphite on off-white wove paper