Office and Factory Buildings, Cali, Colombia, 1945: Perspective

Black crayon on thin off-white wove paper

Black ink and charcoal on cream laid paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Ink and graphite on paper

Graphite on paper

Graphite on off-white wove paper

Charcoal and white and purple chalk on brown wove paper

Pastel on brown pastel board

Black ink and watercolor pencil on cream laid paper, edges taped

Black, blue, and yellow crayon on paper

Tempera on purple construction paper