| title | ISBN-13 | year of publication |
|---|---|---|
| A Bibliography of Recreational Mathematics | 978-0-87353-020-0 | 1978 |
| Bibliography of Recreational Mathematics | 978-0-87353-021-7 | 1970 |
| Bibliography of Recreational Mathematics | 978-0-87353-022-4 | 1970 |
| Bibliography of Recreational Mathematics | 978-0-87353-023-1 | 1970 |
| Mathematics and Science: An Adventure in Postage Stamps | 978-0-87353-122-1 | 1978 |
| The High School Mathematics Library | 978-0-87353-238-9 | 1987 |
L.S. · L. Schaaf · W.L. · W.S. · William L. · William Leonard Schaaf · William S. · William Schaaf