Office and Factory Buildings, Cali, Colombia, 1945: Plan and concrete column detail (1/50" and 1" = 1'-0")

Black ink and colored chalk on off-white wove paper

Graphite on paper

Graphite on off-white wove paper

Turpentine wash with oil on cream laid paper

Charcoal on beige laid paper

Graphite on darkened off-white wove paper, mounted to buff cardboard

Black ink on translucent buff wove paper

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

Watercolor and graphite on white wove paper

Crayon on paper

Black ink on off-white wove paper

Graphite on off-white wove paper