H. C. · Helen C. · Helen Elizabeth Coppen
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Simple Audio-visual Aids to Foreign Language Teaching | 978-0-19-427233-9 (0-19-427233-8) | 1968 | W.R. Lee |
| Simple Audio-Visual Aids to Foreign Language Teaching | 978-0-19-919050-8 (0-19-919050-X) | 1968 | W. R. Lee |