Office and Factory Buildings, Cali, Colombia, 1945: Office unit: plan, elevations, section (1/16" and 1/8" = 1'-0")

Watercolor on off-white wove paper?

Crayon on paper

Black ink, graphite, and yellow chalk on off-white wove paper

Charcoal on canvas board

Graphite on trace paper

Graphite on off-white wove paper

Graphite on blue toned gesso prepared wove paper

Charcoal on paper

Watercolor over graphite on off-white wove paper

Black crayon over graphite grid on brown wove paper

Charcoal on blue-flecked beige laid paper

Transparent and opaque watercolor over graphite on cream moderately textured wove paper