G.L. · Gordon-l · Gordon R. · R. L
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Antique Glass Bottles: Illustrated Guide | Paperback | 978-0-905447-00-1 (0-905447-00-X) | 1976 |
| Bottle Collecting Price Guide | " | 978-0-905447-03-2 (0-905447-03-4) | 1977 |
| Bottle Collecting Price Guide | Hardcover | 978-0-905447-04-9 (0-905447-04-2) | 1977 |