| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Basic Spanish Pronunciation | 978-0-13-069360-0 | 1987 | |
| English Step by Step with Pictures | 978-0-13-282963-2 | 1987 | Lolita Dixson |
| English Step by Step with Pictures Workbook, New Ediition | 978-0-13-279845-7 | 1991 | Robert Dixson |
| Everyday Spanish Idioms | 978-0-13-292913-4 | 1996 | Joseph I. Dixson |
| Grammar Step by Step with Pictures | 978-0-13-141175-3 | 2004 | Robert J. Dixson |
R. B · R. Boggs · R. S. · Ralph B. · Ralph Boggs · Ralph Steele Boggs · S. B