Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Refrigeration system: diagram

Charcoal on blue laid paper

Graphite on paper

Graphite on cream wove paper

Black ink on off-white wove paper

Black ink over graphite on thin cream tracing paper, mounted to cardboard

Graphite on paper

Maroon fabric-bound album with leather spine

Watercolor and gouache on off-white wove paper

studies for Synagogue, pen and ink on paper

Black ink on off-white wove paper (recto and verso)

Watercolor, gouache and gold paint over graphite on heavy off-white wove paper

Graphite on paper