| Issuer: Mongolia
Date: 3/30/1976 (1976 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 247905..0_Years_UNESCO Record of changes |
| Issuer: Mongolia
Date: 3/30/1976 (1976 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 247905..0_Years_UNESCO Record of changes |
