| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Listening: Intermediate | Hardcover | 978-0-19-453418-5 (0-19-453418-9) | 1987 | Diann Gruber |
| Listening: Intermediate | Audio Cassette | 978-0-19-453419-2 (0-19-453419-7) | 1987 | G. Gruber |
| Writing: Elementary | Paperback | 978-0-19-453404-8 (0-19-453404-9) | 1987 | Diann Gruber |