Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Suggested type of welding details (1" = 1'-0")

Black, brown, blue and purple crayon on paper

Graphite on off-white heavy wove paper

Watercolor, white gouache and graphite on off-white cardboard

Crayon on paper

Watercolor and white gouache over graphite on off-white wove paper

Charcoal on cream laid paper

Watercolor and graphite on off-white wove paper

Sketchbook with cardboard covers and spiral wire binding

Graphite on paper

Graphite on paper

Graphite on paper

Graphite on paper