Various small brochures, among others: skylark, R., the German language protectorate Swahili country (1930) ; shrub, H, the Unionspost in the occupied German South west Africa, volume I and II, 1 edition (1920) ; Leonhard, Th., price list. Former German colonies cancel valuation (1966) ; Schlumbohm, H, forerunner and follower of the German colonies and foreign countries postal service institutes. Special catalogue (1930) ; Dresdner Bank, the colonial empire the earth (1940) ; Mallet Veale, H, South West Africa. A cheque Cunning (1928) ; beneath included are partly scarce original reports, among others to Karl Peters.