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

Brown chalk and graphite on off-white wove paper

Graphite on off-white wove paper

Watercolor on off-white wove paper

Watercolor on three sheets of overlapping white wove paper

Black ink, graphite, and glue on cream wove paper

Watercolor on off-white wove paper

Black chalk and watercolor on off-white wove paper

Transparent and opaque watercolor on off-white wove paper

Black ink and graphite on commercially printed cream wove paper

Graphite on off-white wove paper

Watercolor on ruled off-white wove paper

Collage of fern leaves on red wove paper