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

Graphite on paper

Black chalk over graphite on brown wove paper

Graphite and ink on paper

Crayon on paper

Graphite on cream wove paper

Ink, gouache, and staples on orange and off-white wove paper collage elements on paperboard

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

Graphite and white gouache on heavy cream wove paper

Graphite on cream wove paper mounted to heavy cardboard

Graphite on paper

Brown wash with scraping on white wove paper

Graphite on paper