"Cäsar Flaischlen (born Stuttgart, Germany May 12, 1864; died Gundelsheim, Baden-Württemberg, Germany October 16, 1920) was a German poet. He is famous worldwide as the author of "Hab´ Sonne im Herzen" ("Have Sunshine in Your Heart"), which has been translated into various languages." - (en.wikipedia.org 24.12.2019)
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