Untitled (graphite transfer, left page); Untitled (sketch by Piene's daughter [Chloe] right page)

Black crayon on off-white wove paper

Black crayon on off-white wove paper

Colored marker on paper

Black and colored crayons on paper; black crayon

Graphite and colored crayon on paper

Ink on paper

Blue crayon on paper

Colored marker on paper

Graphite on paper

Colored marker on paper

Mixed media

Ink on paper