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7th World Conference on Earthquake Engineering issue of Turkey
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Short desc: 7th World Conference on Earthquake Engineering
Issuer: Turkey Date: 9/8/1980 Occasion: World Conference on Earthquake Engineering / 7th World Conference on Earthquake Engineering Consists of 2 stamps: (See stamps as list) 7 1/2l d=destruction 20l d=seismograph All are perf=13 Record of changes |
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