Menampilkan: Angola - Prangko (1970 - 1979) - 1 prangko.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. Agustus WM: Tiada Ukuran kertas: 50 Desain: José de Moura Ukiran: INCM Perforasi: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, Tipe KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
