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Books about Gelbhaar:
Gelbhaar by Clay Fisher (1962)
Leutnant Blueberry 10. General Gelbhaar by Jean Giraud (Jan 31, 2002)
IN DER WILDNIS KAMBODSCHAS. Abenteuererzahlung mit Zeichnungen von Klaus Gelbhaar. by Hans Lehr
Wiki information Gelbhaar:
Rudi Gelbhaar was a highly decorated Oberleutnant der Reserve in the Kriegsmarine during World War II. He was also a recipient of the Knight's Cross of the Iron Cross. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield...