A. H. · A. Horner · H.A. · H.H.
| title | ISBN-13 | year of publication |
|---|---|---|
| Mathematics for T. E. C.: Level 2 | 978-0-435-71083-5 | 1980 |
| Mathematics for T. E. C.: Level 3 | 978-0-435-71084-2 | 1980 |
| Ordinary National Certificate Mathematics: v. 1 | 978-0-435-71082-8 | 1971 |
| Ordinary National Certificate Mathematics: v. 1 | 978-0-435-71080-4 | 1966 |
| Ordinary National Certificate Mathematics: v. 2 | 978-0-435-71081-1 | 1967 |