R.D. · R. Delbourgo · Roger D.
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Trigonometry: Notes, Problems and Exercies | Hardcover | 978-981-320-710-3 (981-320-710-8) | 2017 |
| Trigonometry: Notes, Problems and Exercies | Paperback | 978-981-320-311-2 (981-320-311-0) | 2016 |