Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Exterior door to roof terrace #308 and flashing details (3" =1"-0" and full size)

Brown ink and wash over graphite on off-white wove paper; verso: brown ink

Tempera on purple construction paper

Black ink, graphite, and yellow ink on off-white wove paper

Watercolor and graphite on white wove paper

Graphite on off-white wove paper

Black fiber-tip ink on off-white wove paper

Charcoal on blue-gray laid paper

Watercolor on off-white wove paper

Graphite on paper

Graphite on paper

Graphite on off-white wove paper

Black ink on cream wove paper