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

Black crayon on off-white wove paper, mounted to cardboard

Graphite and black ink on cream wove paper

Graphite on paper

Watercolor and graphite on off-white wove paper

Black ink on off-white wove paper

Watercolor and gouache over graphite on white wove paper

Ink on paper

Graphite on cream wove paper

Black ink on cream wove paper

Watercolor over graphite on off-white wove paper

Graphite on buff wove paper

White and black conté crayon on gray wove paper