GALVÃO, Henrique. ALBUM COMEMORATIVO DA PRIMEIRA EXPOSIÇÃO COLONIAL PORTUGUESA. Prefácio pelo Senhor Ministro das Colonias. Ilustrações de Eduardo Malta. Edição da Litografia Nacional. Porto. 1934.
1972 article: “Portugal’s Forgotten War"
“For nearly 10 years, Portugal has been engaged in fighting a guerrilla force in Portuguese Guinea, a small colony on the west coast of Africa. In this struggle, the Portuguese Air Force is heavily committed to support the 30,000 ground troops. This recent account of operations is provided by Al J Venteer.”
Posters from the National Archives of Portugal focus on Angola.