Author
Great Britain. Parliament
4
Tanganyika
4
Belgium. Office colonial
3
Niger Coast Protectorate (Nigeria)
2
Oil Rivers Protectorate (Nigeria)
2
Congo (Democratic Republic). Conseil monétaire. Institut d'émission
1
Leopoldville (Congo). Conseil monétaire. Institut d'émission
1
London Chamber of Commerce
1
Portugal. Ministério dos Negócios Estrangeiros
1