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

Graphite on cream wove paper

Black pastel on off-white wove paper

Watercolor on off-white wove paper

Colored pencil over traces of graphite squaring on buff wove paper

Watercolor on ruled off-white wove paper

Charcoal on cream laid paper

Watercolor over graphite on off-white wove paper

Incised line and Aquarelle on white wove paper

Graphite on off-white wove paper

Black ink and graphite on graph paper

Watercolor on heavy off-white wove paper, with scratchwork

Watercolor on ruled off-white wove paper