Untitled (blank, front endpaper, left page); Untitled (Piene signature, right page)

Black crayon on paper

Watercolor and black ink on off-white laid paper

Blue and black marker on paper and translucent film

Graphite on paper

Graphite on paper

Black marker on paper

Colored marker on paper

Black, pink and aqua crayon on paper

Graphite on paper

Graphite on paper

Graphite on paper and mounted

Ink on paper