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

Graphite on paper

Graphite on cream wove paper

Oil on tracing paper

Graphite, watercolor and red crayon on cream wove paper

Watercolor over graphite on white wove watercolor paper

Graphite on off-white wove paper

Black crayon and ink on paper; graphite on paper

Black ink on off-white laid paper

Graphite on white wove paper

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

Black ink and wash on tan wove paper

Black ink, watercolor, and graphite on handmade cream wove paper