Sheets of United Nations - UN offices in Vienna, 1998
| Issuer | Date | Desc | State | ||
| - | no image | UN offices in Vienna | 5/20/1998 | International Year of the Ocean, sheet of 12 types | |
| - |  |
UN offices in Vienna | 6/19/1998 | 50th Anniversary of the World Health Organisation, sheet of 1 type |