Sheets of United Nations - UN offices in Vienna, 2012
| Issuer | Date | Desc | State | ||
| - |  |
UN offices in Vienna | 2/3/2012 | empty sheet (#15909) | incomplete |
| - |  |
UN offices in Vienna | 8/17/2012 | empty sheet (#15910) | incomplete |
| - |  |
UN offices in Vienna | 10/11/2012 | empty sheet (#15911) | incomplete |