| 16-25 August 1971: 12th International Conference On Cosmic Rays, Hobart APM4400 |
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| 16-25 August 1971: 12th International Conference on Cosmic Rays, Hobart APM4400 on addressed air mail cover affixed with 6c red, orange and blue ANA stamp cancelled "16 AUG 1971" FDU
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Item #: INV-127223
Condition Co
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