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

Colored marker on paper

Colored crayons on paper

Black marker on paper

Black crayon on paper

Black crayon on paper

Paint and black ink on smooth off-white wove paper

Graphite on paper

Ink and applied type on paper

Graphite, charcoal, and chalk on paper

Paper

Black crayon on paper and mounted

Sticker on paper