Office and Factory Buildings, Cali, Colombia, 1945: Elevations (1/16" = 1'-0")

Watercolor, gray wash, and graphite on off-white wove paper

Graphite on buff wove paper

Charcoal heightened with white chalk on white paper

Graphite, colored crayons and felt tip ink on white wove paper

Watercolor and graphite on off-white wove paper

Graphite on tan wove paper

Colored crayons on paper

Graphite on buff wove paper

Black ink and yellow chalk on translucent buff wove paper

Watercolor on heavy off-white wove paper, with scratchwork

Charcoal and white and purple chalk on brown wove paper

Black ink over graphite on thin tracing paper, mounted to off-white cardboard