10th World Mining Congress issue of Turkey
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Short desc: 10th World Mining Congress
Issuer: Turkey Date: 9/17/1979 Occasion: 10th World Mining Congress Consists of 4 stamps: (See stamps as list) 5l d=Colemanite 7.5l d=Chromite 10l d=antimonite 15l d=Sulphur All are dt=minerals (1979) perf=13 Record of changes |
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