Office and Factory Buildings, Cali, Colombia, 1945: Revision of drawing BRGA.105.18 (1/8", 1/4", 1 1/2" and 6" =1'-0")

Graphite on off-white wove paper

Black ink over graphite on off-white wove paper

Crayon, opaque watercolor and graphite on white thick rough wove paper

Graphite on cream laid paper

Watercolor and ink on paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Graphite on paper

Ink on paper

Graphite on paper

Graphite on off-white wove paper

Watercolor on off-white wove paper

Watercolor and graphite on layered off-white wove paper