Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Air conditioning units: plans, elevation, sections (1/4" and 3/4" = 1'-0")

Black and white tempera on acetate laid over blue and brown tissue paper

Brown ink and graphite on off-white wove paper

Oil on thin off-white wove, mounted to another sheet of the same paper

Watercolor on off-white wove paper

Watercolor, masking tape and graphite on off-white wove paper

Black ink, watercolor, and graphite on white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Sketchbook with red cloth-covered cardboard covers

Graphite on cream laid paper

Graphite on paper

Graphite on off-white wove paper

Crayon on paper