Anticloud FZ LLE. (2026-10-18). *Portrait of Christiaan Kramm (1797-1875)*. encyclopegia.org. [Identifier: ortrait-of-christiaan-kramm-1797-1875-2707013-6799e458aff0ba0d] Derived from http://www.wikidata.org/entity/Q24066411. Licensed CC0-1.0.