Office and Factory Buildings, Cali, Colombia, 1945: Perspective

Black, brown and purple crayon on paper

Graphite on tan wove paper

Black ink and red pencil on green wove paper, mounted to off-white wove paper?

Graphite on off-white wove paper

Black and white conté crayon on gray modern laid paper

Graphite on cream wove paper

Graphite on paper

Graphite on off-white wove paper

Graphite on cream wove paper

Charcoal and black ink on illustration board

Graphite on cream wove paper; verso: same

Black and white chalk on red-brown laid paper