Untitled (North American air distances, left page); Untitled (metric information, right page)

Colored marker and blue pen on paper

Black crayon and ink on paper

Ink, applied type, and typewritten text on paper

Black ink on off-white wove paper

Black, red, and white chalk on off-white wove paper prepared with brown ground

Colored marker on paper

Charcoal on cream laid paper

Watercolor on paper

Black marker on paper

Graphite on cream paper

Colored pencil and graphite on paper

Graphite on paper