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" == Copyright problem removed == Prior content in this article duplicated one or more previously published sources. The material was copied from: http://web.archive.org/web/20070807232021/http://demirtas.com.tr/Wurzelpeter.htm. Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see ""using copyrighted works from others"" if you are not the copyright holder of this material, or ""donating copyrighted materials"" if you are.) For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a means