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

Black ink, graphite, and colored chalk on translucent buff wove paper

Charcoal on off-white laid paper

Graphite with extensive erasure, rubbing and scratchwork on off-white wove paper

Pastel on brown pastel board

Graphite on ivory laid paper

Black fiber-tip ink on off-white wove paper

Ink and brown pencil on white wove paper

Watercolor over graphite on off-white wove paper

Black, red, and white crayon on yellow wove paper, mounted on board

Black ink on off-white wove paper

Graphite on paper

Charcoal on blue laid paper