| title | ISBN-13 | year of publication |
|---|---|---|
| Graphs and their Uses | 978-0-88385-635-2 | 1991 |
| Invitation to Number Theory | 978-0-88385-620-8 | 1967 |
| Niels Henrik Abel | 978-0-8218-4644-5 | 2008 |
| Number Theory and Its History | 978-0-486-65620-5 | 1988 |
| Number Theory and Its History. | 978-0-07-047675-2 | 1948 |
| The Four-Color Problem | 978-0-12-528150-8 | 1967 |
| Theory of Graphs | 978-0-8218-1038-5 | 1962 |
Academic Press · Amer Mathematical Society · Dover Publications · McGraw-Hill