| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| A student's laboratory manual for German: A structural approach | 978-0-393-09927-0 | 1970 | |
| A teacher's manual for German, a structural approach | 978-0-393-09360-5 | 1973 | |
| A teacher's manual for German: a structural approach | 978-0-393-09918-8 | 1970 | |
| German: A Structural Approach | 978-0-393-95464-7 | 1988 | William E. Petig · F. W. Strothmann |
| German: A structural approach | 978-0-393-95059-5 | 1980 | |
| German: a structural approach | 978-0-393-09345-2 | 1973 | |
| German: Tchrs': A Structural Approach | 978-0-393-95470-8 | 1989 | F. W. Strothmann · William E. Petig |
| Lohnes Study Guide for German - a Structural Approach 3ed | 978-0-393-95064-9 | 1986 | F. W. Strothmann |
| Study Guide for German a Structural Approac | 978-0-393-09352-0 | 1973 | |
| Study Guide for German: A Structural Approach, 4th Edition | 978-0-393-95467-8 | 1988 | William E. Petig |