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\bibitem{Norton2001} Norton, F. J. (2001). Las primeras ediciones de {\textquotedblleft}La Celestina{\textquotedblright}. En S. L{\'o}pez-R{\'\i}os (Ed.), \textit{Estudios sobre {\textquotedblleft}La Celestina{\textquotedblright}} (pp. 39--55). Tres Cantos: Istmo.

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