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

Graphite on heavy cream wove paper

Graphite and ink on translucent wove paper

Transparent watercolor and black ink on cream wove paper

Graphite on off-white wove paper

Charcoal on cream laid paper

Graphite, black crayon and ink on paper

Black ink on white Saunders watercolor board

Colored pencil and graphite on cream wove translucent paper

Watercolor on cream wove paper

Black ink and graphite on off-white wove graph paper

Graphite on off-white wove paper

Graphite on paper