| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Spectrum 1: A Communicative Course in English: Textbook/20088 | 978-0-13-826637-0 (0-13-826637-9) | 1984 | Sandra Costinett · Donald R. H. Byrd |
| Spectrum 4: A Communicative Course in English: Textbook/20139 | 978-0-13-826660-8 (0-13-826660-3) | 1982 | Sandra Costinett · Donald Byrd |
| Spectrum 5: A Communicative Course in English: Textbook/20141 | 978-0-13-826678-3 (0-13-826678-6) | 1982 | Sandra Costinett · Donald R. H. Byrd |
D.W. · Dana Warryck · Diana Wierich · Dionne Warwick · Donna Wares