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

Charcoal on off-white laid paper

Graphite on cream wove paper

Graphite and collage element on paper

Black ink on white Saunders watercolor board

Black crayon and ink on paper

Black ink and charcoal on cream laid paper

Graphite on darkened wove paper

Graphite on green prepared paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Graphite on paper

Watercolor and graphite on cream wove paper