| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Conservational French 20 Lessons. | 978-0-06-463601-8 | 1980 | |
| Conversational Japanese in 20 Lessons | 978-0-06-463606-3 | 1980 | |
| Conversational Modern Greek | 978-0-06-463604-9 | 1980 | |
| Conversational Spanish 20 Lessons | 978-0-06-463600-1 | 1983 | |
| Vest Pocket Modern Greek | 978-0-8489-5106-1 | 1999 | George Christos Pappageotes |
| Vest Pocket Modern Greek | 978-0-06-464904-9 | 1979 | |
D.C. · R. C. · R. Cortina · R.D. · R. D. Cortina Company