G L. · Gabriel Lieberum · Gabriela Leveroni
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Outlook on Space Law over the Next 30 Years | 978-90-411-0405-2 (90-411-0405-4) | 1997 |
| Outlook on Space Law over the Next 30 Years:Essays Published for the 30th Anniversary of the Space Treaty | 978-90-411-0402-1 (90-411-0402-X) | 1997 |