Office and Factory Buildings, Cali, Colombia, 1945: Revision of drawing BRGA.105.18 (1/8", 1/4", 1 1/2" and 6" =1'-0")

Watercolor on off-white wove paper

Charcoal, graphite and black ink on cream wove paper

Graphite on off-white wove paper

Graphite and collage elements on paper

Ink on slide film, hand colored

Graphite on tracing paper

Paper collage elements on black coated paper

Colored crayons on paper and mounted

Black ink on off-white wove paper

Oil on unstretched canvas

Black ink on off-white wove paper

Black ink over graphite on brown wove paper