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

Graphite and graphite wash on layered translucent vellum paper

Graphite on paper

Graphite on prepared paper mounted on card, with extensive scratchwork

Oil on white wove paper

Black fiber-tip ink on cream card

Graphite on off-white wove paper, mounted on cardboard

Black ball-point ink on olive green modern laid paper

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

Watercolor and white gouache on cream wove paper

Black crayon on heavy off-white wove paper

Graphite on off-white wove paper

Watercolor on ruled off-white wove paper