| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| GCSE Essentials OCR Twenty First Century Additional Science Workbook Answers: OCR Gateway Science Answers | 978-1-905896-47-9 (1-905896-47-6) | 1990 | J. Davies · L. Herklots |
| OCR Gateway GCSE Additional Science Essentials Workbook Answers | 978-1-905896-33-2 (1-905896-33-6) | 2007 | J. Davies · L. Herklots |