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	Guenter Koch (tenor) Ludwig van Beethoven - Canon a 4 `Ta, ta, ta, lieber Maelzel`, WoO 162 Joahim Vogt (tenor), Wolfgang Wagner (tenor), Guenter Koch (tenor), Werner Eberhardt (bass) May/June 1976, Berlin. (10) Ludwig van Beethoven - Canon a 3 `Ewig dein`, WoO 161 Joahim Vogt (tenor), Wolfgang Wagner (tenor), Guenter Koch (tenor) May/June 1976, Berlin. (5) Ludwig van Beethoven - Canon à 3 `Freundschaft ist die Quelle wahrer Glückseligkeit`, WoO 164 Joahim Vogt (tenor), Wolfgang Wagner (tenor), Guenter Koch (tenor) May/June 1976, Berlin. (5)