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

Watercolor on off-white wove paper

Opaque watercolor on purple construction paper

Watercolor and graphite on buff wove paper

Watercolor and white gouache over graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Watercolor, black ink and metallic paint over graphite on buff wove paper

Black ink on white wove paper

Charcoal on white paper

Graphite on thin off-white wove paper

Black chalk on yellow wove paper

Black ink on off-white wove paper

Watercolor over graphite on off-white wove paper