Office and Factory Buildings, Cali, Colombia, 1945: Plan and concrete column detail (1/50" and 1" = 1'-0")

Graphite and black ink on off-white wove paper

Colored crayons on paper

Watercolor on cream wove paper

Black ink on white wove paper

Graphite on translucent wove paper

Graphite on paper

Black ink and wash on ivory wove paper

Graphite on cream wove paper

Black ink, graphite, and yellow chalk on off-white wove paper

Watercolor over graphite on off-white wove paper

Charcoal and colored chalks on a ground of rubbed charcoal heavily modeled by erasures, on off-white wove paper, mounted on Kraft paper and wrapped around a strainer

Black ink, gouache, and graphite, incised, on paperboard