Office and Factory Buildings, Cali, Colombia, 1945: Office unit: details (3/8" and 1" = 1'-0")

Watercolor over graphite on off-white laid paper

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

Black ink on off-white wove paper

Graphite on paper

Black ink on paper

Watercolor over graphite on heavy off-white wove paper

Black ink on tan wove paper

Gray wash on off-white paper mounted on light card

Graphite on paper

Acrylic and gouache (?) and graphite on off-white handmade wove paper

Graphite and gray and brown wash on off-white wove paper

Graphite on off-white tracing paper