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Koenig, Rudolph. 1885. “ Tuning-Fork By Dr. R. König: 11”.
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Koenig, Rudolph. 1885. “ Tuning-Fork By Dr. R. König: Sol₆”.
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Koenig, Rudolph. 1885. “ Tuning-Fork By Dr. R. König: 14”.
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Koenig, Rudolph. 1885. “ Tuning-Fork By Dr. R. König: Fa₆”.
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Koenig, Rudolph. 1885. “ Tuning-Fork By Dr. R. König: La₆”.
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Koenig, Rudolph. n.d. “ Tuning-Fork By Dr. R. König: Mi₁ - Fa₁: Fa₁ 3:4”. 170,7 Vs.
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Koenig, Rudolph. n.d. “ Tuning-Fork By Dr. R. König: Mi₁ - Fa₁: Fa₁ 5:7”. 179,2 Vs.
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Koenig, Rudolph. n.d. “ Tuning-Fork By Dr. R. König: Mi₁ - Fa₁: Mi₁ 4:5”. 160 Vs.
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Koenig, Rudolph. n.d. “ Tuning-Fork By Dr. R. König: Mi₁ - Fa₁: Mi₁ 5:6”. 153,6 Vs.
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Koenig, Rudolph. n.d. “ Tuning-Fork By Dr. R. König: Mi₂”. 320 Vs.