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

Blue crayon on paper

Graphite on paper

Black chalk on faded blue laid paper

Black, brown and blue crayon on paper

Graphite on paper

Graphite on paper

Black crayon on paper

Graphite on paper

Ink on paper

Colored marker on paper

Graphite on paper

Alkyd paint on coated paper, laid down on card