| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Early Childhood Mathematics | 978-0-02-895791-3 (0-02-895791-1) | 1992 |
| Research Ideas for the Classroom: Early Childhood Mathematics | 978-0-02-895794-4 (0-02-895794-6) | 1993 |
J J · J. Jensen · R.J. · R. J. Jensen · R. Jensen · Robert J. · Robert Jensen