Zobrazujú sa: Angola - Poštové známky (1970 - 1979) - 1 známky.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. august WM: nikto Veľkosť hárka: 50 Dizajn: José de Moura Rytina: INCM Perforácia: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, typ KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
