Sheets of United Nations - UN offices in Vienna, 1997
| Issuer | Date | Desc | State | ||
| - |  |
UN offices in Vienna | 5/30/1997 | 5th Anniversary of the Conference on the Environment and Development, Rio de Janeiro, sheet of 1 type |
| Issuer | Date | Desc | State | ||
| - | |
UN offices in Vienna | 5/30/1997 | 5th Anniversary of the Conference on the Environment and Development, Rio de Janeiro, sheet of 1 type |