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

Black chalk on off-white laid paper

Charcoal on white wove paper

Black wax crayon on tan wove paper

Black felt-tip ink on white wove paper

Graphite and white pastel on gray-green wove paper

Black ink, white gouache, and black crayon on off-white laid paper

Charcoal on off-white laid paper

Black marker on graph paper

Graphite and gray wash on white wove paper

Brown ink over graphite on gray-green wove paper

Graphite on off-white wove paper

Black ink and blue gouache on off-white card