Office and Factory Buildings, Cali, Colombia, 1945: Revisions: elevation, section (1/8" and 1/2" =1'-0")

Colored crayon on paper

Graphite on paper

Graphite on paper

Black ink and charcoal on cream laid paper, edges taped

Graphite on off-white tracing paper

Red ink, green fiber-tipped ink and watercolor on off-white wove paper

Black ink on white wove paper

Watercolor over graphite on off-white wove paper

Graphite on thin off-white wove paper

Charcoal on blue laid paper

Watercolor, graphite, gouache and black ink on cream wove paper mounted on board

Black ink, blue-gray and purple watercolor, graphite, and white gouache on cream wove paper, scorched and repaired with notebook paper patch; verso: blue-gray watercolor and graphite