| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Seminar on Tourism Development and the Responsibility of the State: Budapest, Hungary, 15 February 1993 | 978-92-844-OO47-8 (92-844-OO47-3) | 1993 | World Tourism Organization |
O D · O T · S D · S.O. · S. T. · S.T.D. · T. D.
Seminar on Transport Packaging for Radioactive Materials Vienna 1976