The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda 1971
Sýni: Angóla - Venjuleg frímerki - 1971 - The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda - 1 frímerki.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. ágúst WM: Ekkert Síðu stærð: 50 Hönnun: José de Moura Leturgröftur: INCM Götun: 13½
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