The 2nd International Large Dams Congress, Cairo 1993
Sýni: Egyptaland - Venjuleg frímerki - 1993 - The 2nd International Large Dams Congress, Cairo - 1 frímerki.
Sýni: Egyptaland - Venjuleg frímerki - 1993 - The 2nd International Large Dams Congress, Cairo - 1 frímerki.
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