| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Oil and Gas Directory, 1987/88: Regional and Worldwide Exploration, Drilling, Producing Coverage | 978-99973-64-09-8 (99973-64-09-0) | 1987 |
| Oil and Gas Directory, 1988-89: Regional and Worldwide Exploration, Drilling, Producing Coverage | 9998886805 (9998886805) | 1988 |