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| 1970-09-14 | 7th World Sociological Congress, Varna |
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perf. 12 1/2; |
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copies 120 000 |
* LC# - Каталог на СП "Българска филателия и нумизматика"
Mi# - MICHEL Briefmarken Kataloge
Sc# - Scott Postage Stamp Catalog
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| Complete set (1) | | |
0.10 €
buy all
set MNH |
n.a. used |
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