. . "Drawings" . . "The collection contains production material for fifteen titles published between 1959 and 1975. Production materials include studies done in a variety of media including ink & pencil, crayon & ink, felt pen, pencil & ink , felt pen & pencil, crayon, and crayon & felt pen, and the collection also contains a pencil and ink sketch." . "Studies" . "Book illustrations" . "Sketches" . "Papers" . . . . . .