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\bibitem{MoraRioja2021} Mora Rioja, A. (2021). \textit{{\textquotedblleft}Into the Valley of Death{\textquotedblright}: A Textual and Musical Analysis of Metal Music{\textquoteright}s Adaptation, Appropriation, and Quotation of Poetry in English}. Ph.D. thesis, UNED, Madrid.

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