Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Electrical plan - ground floor (1/4" =1'-0")

Conté crayon and graphite on cream wove paper; verso: graphite

Black ink on off-white wove paper

Black chalk on cream laid paper

Graphite on off-white wove paper

Crayon on paper

Colored pencil on gray-green laid paper

Black and colored crayon on off-white wove paper

Black ink over graphite on cream laid paper

Graphite on paper

Graphite on off-white wove paper

Black colored pencil on tan wove paper

Graphite with ink on paper