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

Sketchbook with cardboard covers and spiral wire binding

Graphite on off-white wove paper

Graphite on paper

Oil on paper

Watercolor over graphite on off-white wove paper

Sketchbook with beige cloth covers and Fabriano paper pages

Black ink, graphite, and yellow chalk on off-white wove paper

Graphite on paper

Oil on white paper

Black ink and wash on white wove paper

Graphite and blue crayon on off-white wove paper

Black crayon on off-white wove paper