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

Graphite on off-white wove paper

Graphite on dark cream wove paper, darkened

Graphite on off-white wove paper

Charcoal on blue-gray laid paper

Crayon on paper

Red, black and brown conté crayon on ivory tracing paper

Enamel on white wove paper

Graphite on off-white wove paper

Black felt-tipped pen on yellowed newsprint paper

Charcoal on off-white laid paper

Graphite and wax crayon on glossy wove paper

Graphite on tan wove paper