Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Detail of waterstop at covered ramp: elevations and section (1/4" = 1'-0" and full size)

Charcoal on off-white laid paper

Black crayon over graphite on off-white wove paper

Black ink and graphite on cream wove paper

Graphite, red and blue pencil on off-white wove paper

Graphite on paper

Colored crayons on paper and mounted

Graphite on off-white laid paper

Graphite on off-white wove paper

Graphite on paper

Graphite on thin off-white wove paper

Graphite on off-white wove paper

Black ink, gouache, and graphite, incised, on paperboard