Ekert Ya. 500 muzykal'nykh zagadok./Eckert I. 500 musical puzzles. In Russian (ask us if in doubt). - landofmagazines.com

TransliterationEkert Ya. 500 muzykal'nykh zagadok.

In EnglishEckert I. 500 musical puzzles. In Russian (ask us if in doubt).

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