Office and Factory Buildings, Cali, Colombia, 1945: Plan and concrete column detail (1/50" and 1" = 1'-0")

Black ink on off-white wove paper

Graphite on paper

Watercolor, white gouache and chalk over graphite on off-white wove paper

Watercolor on off-white wove paper

Graphite on off-white wove paper

Colored crayons on paper

Black ink, charcoal, colored pencil, and watercolor pencil on cream wove paper

Watercolor over graphite on off-white wove paper

Acrylic on off-white wove paper

Pastel and graphite on white wove paper

Graphite on paper

Charcoal on beige laid paper