Office and Factory Buildings, Cali, Colombia, 1945: Office unit: plans, elevations (1/8" = 1'-0")

Charcoal and graphite on illustration board

Sketchbook with brown paper covers (Strathmore 400 series)

Black ink and gray wash over chalk on off-white wove paper

Ink on paper

Black crayon on cream tracing paper

Graphite on paper

Graphite on paper

Watercolor, with extra binder, over graphite on cream laid paper

Graphite on off-white wove paper

Oil crayon, colored pencil and graphite on paper

Watercolor, gouache, black ink and graphite on cream wove paper mounted on board

Colored crayons on paper