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

Ink with collage on paper

Watercolor over black chalk on off-white wove paper

Black ink, blue ball-point, graphite, and red pencil on off-white wove paper

Pastel on white paper

Graphite on off-white wove paper

Black tempera on darkened off-white wove paper

Graphite on cream wove paper

Graphite and ink on translucent wove paper

Black chalk on off-white wove paper

Graphite on paper

Acrylic on off-white wove paper

Colored crayons on paper