1. Report on the Progress of Civil Aviation, 1929-1936; Civil Aviation - Statistical and Technical Review 1937-1938, UK Air Ministry - Directorate of Civil Aviation SRL S629.1306/2.
2. Australia and New Guinea – Aviation 1927-1941.
3. BGD’s planes: Freight carried by weight (short tons) 1931-1942.
4. Guinea Airways' share of total freight and passengers.
1. Report on the Progress of Civil Aviation, 1929-1936; Civil Aviation - Statistical and Technical Review 1937-1938, UK Air Ministry - Directorate of Civil Aviation SRL S629.1306/2.
