Preussens Diplomatie in der Türkei - Scheel, Helmuth (Aus: Mitteilungen d. Seminars f. oriental. Sprachen ; 33,2, 1931)
Includes facsims. of correspondence from Ahmed III to Friedrich Wilhelm I, Mustafā III to Friedrich II, ʻAbd ul-Hamīd Chān to Friedrich II. 1928.