Office and Factory Buildings, Cali, Colombia, 1945: Revisions: elevation, section (1/8" and 1/2" =1'-0")

Colored crayons on paper and mounted

Black ink on white illustration board

Watercolor and graphite on white wove paper

Graphite on paper

Black crayon on paper

Black ink on off-white handmade rice paper

Watercolor on off-white wove paper

Gray wash and graphite on off-white wove paper

Mixed media on paper

Graphite on off-white wove paper

Graphite on paper

Charcoal on off-white laid paper