| Issuer: Cuba
Issue: International Quiet Sun Year Date: 5/10/1965 (1965 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 50c d=Effect on satellite orbits |
External links: Colnect 507205..Quiet_Sun_Year |
| Issuer: Cuba
Issue: International Quiet Sun Year Date: 5/10/1965 (1965 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 50c d=Effect on satellite orbits |
External links: Colnect 507205..Quiet_Sun_Year |
