The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda 1971
Now showing: Angola - Postage stamps - 1971 - The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda - 1 stamps.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. August WM: None Sheetsize: 50 Design: José de Moura Engraving: INCM Perforation: 13½
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