| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Intermediate Language Lessons | Hardcover | 978-1-4372-4962-0 | 2008 |
| Intermediate Language Lessons | Paperback | 978-0-9798469-0-8 | 2007 |
| Intermediate Language Lessons | Hardcover | 978-0-9652735-7-2 | 1997 |
| In the Animal World: -1913 | Paperback | 978-1-112-27688-0 | 2009 |
| In The Animal World | Hardcover | 978-1-104-20710-6 | 2009 |
| Primary Language Lessons | " | 978-0-9652735-1-0 | 1996 |
Cornell University Library · Hillside Education · Kessinger Publishing, LLC · Lost Classic Books