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

Watercolor over graphite on heavy white wove paper; verso: watercolor over graphite; some color applied and worked with a tool and fingers

Graphite on paper

Graphite on off-white wove paper

Watercolor on white wove paper

Graphite on off-white wove paper

Mixed media on paper

Red, brown, black and white conté crayon on gray wove paper

Acrylic, graphite, and computer print-out on off-white wove paper

Colored pencil on off-white card

Graphite on beige lined notebook paper

Mixed media on paper

Charcoal on paper