| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Crystal Clear Cobol: Advanced Cobol and Database Concepts | 978-0-13-194192-2 (0-13-194192-5) | 1990 |
| Crystal Clear Cobol: An Introduction to Cobol and Structured Programming | 978-0-13-195017-7 (0-13-195017-7) | 1989 |
H.T. · W H · W. T. · W. Trotter · William H. · William T · William Trotter