C.H. · C.R. · C. Roberts · H. Roberts
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Ohio Geography, History and Government | 978-0-02-652950-1 (0-02-652950-5) | 1990 |
| Ohio Geography, History and Government | 978-0-02-652951-8 (0-02-652951-3) | 1990 |
| Practical business management | 978-0-8062-0762-9 (0-8062-0762-0) | 1977 |