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

Charcoal on off-white laid paper

Black wash over graphite on cardboard

Graphite on paper

Black ink and gray wash on cream wove paper

Black ink on cream wove paper

Blue pen on commercially lined yellow paper

Graphite and blue crayon on off-white wove paper

Blue crayon and ink ; blue crayon on paper

Black ink, black wash and red watercolor on white modern laid paper

Graphite on off-white wove paper (recto and verso)

Graphite on off-white wove paper (recto and verso)

Graphite on darkened off-white wove paper