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"Blutwurz". Bayerisches Staatsministerium für Ernährung, Landwirtschaft und Forsten. Archived from the original on July 26, 2011. Retrieved June 4, 2011.
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web.archive.org
"Blutwurz". Bayerisches Staatsministerium für Ernährung, Landwirtschaft und Forsten. Archived from the original on July 26, 2011. Retrieved June 4, 2011.