| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Group work in secondary schools and the training of teachers in its methods | 978-0-19-836803-8 (0-19-836803-8) | 1968 | |
| Group Work in Secondary Schools and the Training of Teachers in Its Methods | 978-0-19-836808-3 (0-19-836808-9) | 1968 | Irvine Rogers |