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\bibitem{Czajkowska2020} Czajkowska, K. J. (2020). {\textquotedblleft}Ten gitarowy huk{\textquotedblright}. Pocz{\k a}tek i rozw{\'o}j metalu na festiwalu w Jarocinie [{\textquotedblleft}That guitar boom{\textquotedblright}. The beginning and development of metal at the festival in Jarocin]. In J. Kosek (Ed.), \textit{Arty{\'s}ci i sceny metalowej (kontr)kultury [Artists and the metal (counter) culture scene]} (pp. 118--133). Krak{\'o}w: Wydawnictwo Naukowe Uniwersytetu Pedagogicznego.

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