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

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Black and blue crayon on paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on white paper

Black crayon on cream laid paper

Graphite on off-white wove paper

Watercolor on off-white wove paper

Black ink and graphite on translucent vellum paper

Graphite on off-white wove paper

Graphite on oiled buff laid paper

Oil stick on white wove paper; verso: black ink