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Source:
Colnect
Issuer:
Poland
Date:
8/19
/
1973
(
1973 sheets
)
INCOMPLETE
Block 1 (0, 0 x 0)
Prev:
Poland space-based observatories, sheet of 1 type
Next:
Poland 1973 empty sheet (#8829)
External links:
Colnect 199249..l_Exhib_Poznan