Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Portable loudspeaker unit: plan, elevation, sections (3" = 1'-0")

Black ink on off-white wove paper

Charcoal on cream laid paper

Graphite on paper

Opaque watercolor and graphite on paper-faced board

Graphite on paper

Graphite on paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Ink and graphite on paper

Black ink on frosted mylar

Graphite on off-white wove paper

Watercolor