Offer of the Regierungsrat Dr. Ruland, Cologne, concerning subscription of colonial literature Zur Zwischenablage hinzufügen NLA HA, Dep. 105, Nr. 471 Akt(e) 1914 - 1914 Teil vonLower Saxony State Archive, Hanover Department In: Lower Saxony State Archive, Hanover Department >> Company archive and estate of Bernhard Sprengel