. "128048" . "CAJKOVSKIJ, PËTR |f [componist]" . "12 p'es srednej trudnosti = 12 pieces of moderate difficulty (1878, op. 040). Étude, piano, CS 136 128048 132195 132198 179593 482923 CAJKOVSKIJ, PËTR |f [componist]" . . "132195" . "12 p'es srednej trudnosti = 12 pieces of moderate difficulty (1878, op. 040). Étude, piano, CS 136" . . "482923" . "12 p'es srednej trudnosti = 12 pieces of moderate difficulty (1878, op. 040). Étude, piano, CS 136" . "132198" . . . . . "179593" . "482923" .