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

Graphite on buff wove paper

Graphite on paper

Graphite on paper

Watercolor over graphite? on off-white wove paper

Watercolor over graphite on off-white illustration board

Black ink and tan wash on white wove paper

Pastel on white paper

Black ink on heavy brown wove paper

Graphite, black ink, and black crayon on off-white wove paper

Graphite on white wove paper

Black ink and charcoal on cream laid paper, edges taped

Crayon on paper