Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Water heating system: plan and elevation

Black ink and white gouache on white modern laid paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Black ink, watercolor and graphite on darkened beige wove paper mounted to brown cardboard

Graphite on off-white wove paper

Watercolor on off-white wove paper

Graphite and black chalk on off-white wove paper

Beeswax, graphite, detritus and debris on wove paper

Watercolor and black ink on heavy white wove paper

Photographic reproduction with collage, black ink, white gouache and graphite on white wove paper

Graphite, red crayon, and white gouache on off-white wove paper