Ora in esposizione: Angola - Francobolli postali (1970 - 1979) - 1 francobolli.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. Agosto WM: Nessuno Dimensioni del foglio: 50 Disegno: José de Moura Incisione: INCM Dentellatura: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, Scrivi KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
