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

Black ink and charcoal on beige wove paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Graphite and found fiber on handmade paper

Watercolor on cream wove paper

Watercolor and graphite on white wove paper

Charcoal on blue laid paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Black ink on off-white wove paper (recto and verso)

Gray pastel with incised lines in rows on white wove paper