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

Ink on slide film, hand colored

Graphite on paper

Crayon on paper

Black ink over graphite on modern laid paper

Ink and graphite on paper

Black ink on heavy brown wove paper

Graphite on paper

Black ink and charcoal on cream laid paper

Crayon on paper

Crayon and graphite on beige wove paper

Graphite and gouache on wove paper

Graphite on off-white wove paper