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

Black ink on off-white wove paper

Black ink on off-white wove paper

Watercolor, gouache, and graphite on tan wove paper

Black chalk on buff tracing paper

Transparent and opaque watercolor and graphite on beige wove paper mounted to board

Graphite on ruled cream wove paper

Charcoal on off-white laid paper

Acrylic on off-white wove paper

Watercolor over charcoal? on off-white wove paper

Graphite on off-white wove paper

Watercolor on paper

Black and red crayon on thin off-white wove paper