W R. ยท William R.
| title | ISBN-13 | year of publication |
|---|---|---|
| Essentials in Chemistry | 978-0-03-030353-1 | 1993 |
| Essentials of Chemistry | 978-0-03-074221-7 | 1997 |
| Essentials of Chemistry | 978-0-03-030337-1 | 1992 |
| Ssm Essentials of Chemistry: Extended Edition | 978-0-03-043098-5 | 1992 |