Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Air conditioning units: plans, elevation, sections (1/4" and 3/4" = 1'-0")

Graphite on off-white wove paper

Black and blue crayon on paper

Black ink on off-white cardboard

Black ink, graphite, and yellow chalk on off-white wove paper; verso: black ink

Graphite on off-white wove paper

Colored crayons on paper

Graphite on off-white cardboard

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite on paper

Crayon on paper

Watercolor, black ink and white gouache on heavy buff wove paper