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

White and black conté crayon on tan cardboard

Black crayon on paper

Black ink on off-white laid paper

Black crayon on off-white wove paper

Black ink and graphite on off-white wove paper

Graphite on paper

Black chalk on off-white laid paper

Graphite on off-white wove paper

Graphite on paper

Graphite on oiled buff laid paper

Watercolor and graphite on white wove paper

Graphite, oil pastel, clear and colored wax crayons, and watercolor on white wove paper with multiple impressions