| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Geological Problem Solving with Lotus 1-2-3 | 978-0-08-036941-9 (0-08-036941-3) | 1990 |
| Oracle 7: The Complete Reference | 978-0-07-881919-3 (0-07-881919-9) | 1993 |
| Oracle: The Complete Reference | 978-0-07-881635-2 (0-07-881635-1) | 1990 |
G. K. · G. Koch · G S · George K. · George Koch · George S. · S.K. · S. Koch