Office and Factory Buildings, Cali, Colombia, 1945: Office unit: construction and millwork details (1/4", 1", 1 1/2" and 6" = 1'-0")

Charcoal on tan wove paper, squared

Mixed media on paper

Charcoal on blue wove paper

Watercolor, wax crayon and red pencil on orange wove paper

Black crayon and graphite on off-white wove paper

Oil on off-white wove paper

Graphite on off-white wove paper

Transparent and opaque watercolor and graphite on white wove paper

Red and brown conté crayon on cream wove paper

Watercolor and black ink on white wove paper

Graphite on buff wove paper

Graphite on orange wove paper