| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Learning to Teach Number: A Handbook for Students and Teachers in the Primary School | 978-O-7487-3515-O (O-7487-3515-1) | 1999 | Len Frobisher · John Monaghan · Anthony Orton · Tom Roper · John Threlfall |
Jan Ordynski · Jane Orton · Johann Ortner · John Orton · Jon Ortner