Pennsylvania Pavilion for World's Fair, New York, 1939: Suspended aluminum bridge: plan, elevations, section, (1/8" = 1'-0")

Black colored pencil on tan wove paper; verso: black ink

Charcoal on off-white laid paper

Graphite on off-white laid paper

Acrylic and oil stick on three (?) layers of white wove paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Charcoal on off-white laid paper

Watercolor and white gouache on off-white laid paper

Graphite on paper

Black ball-point ink on cream wove paper; verso: same

Graphite on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding