Office and Factory Buildings, Cali, Colombia, 1945: Elevation (1/16" = 1'-0")

Black ink on off-white wove paper

Charcoal on off-white laid paper

Blue crayon on paper

Black ink, black crayon and white gouache on off-white laid paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Charcoal and graphite on blue laid paper

Watercolor on cream wove paper

Watercolor over graphite on off-white card

Graphite on paper

Watercolor and graphite on off-white wove paper

Black and brown ink on off-white wove paper

Charcoal on white wove paper