Keywords: Gustav Hellmann cropped.jpg en Gustav Hellmann 1854 “1939 german meteorologist and climatologist de Gustav Hellmann 1854 “1939 deutscher Meteorologe und Klimatologe Gustav_Hellmann jpg 2009-11-21 10 01 UTC Gustav_Hellmann jpg Creator Rudolf Dührkoop derivative work Polimerek <span class signature-talk >talk</span> cropped and contrast Polimerek Gustav_Hellmann jpg PD-old original upload log This image is a derivative work of the following images File Gustav_Hellmann jpg licensed with PD-old 2008-10-02T07 39 32Z Otberg 553x800 35836 Bytes <nowiki> en Gustav Hellmann 1854 “1939 german meteorologist and climatologist de Gustav Hellmann 1854 “1939 deutscher Meteorologe und Klimatologe http //www sammlungen hu-berlin d</nowiki> Uploaded with derivativeFX Rudolf Dührkoop |