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

Black ink, charcoal, and colored pencil on cream laid paper

Graphite on paper

Pastel and compressed charcoal on off-white paper

Black ink and gray wash on cream wove paper

Black ink, graphite, and colored chalk on off-white wove paper; verso: black ink

Charcoal on off-white laid paper

Graphite on paper

Collage

Graphite on paper

Crayon and graphite on pieced paper

Watercolor and graphite on white wove paper

Graphite on cream wove paper