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\bibitem{CostaFontes1988} Costa Fontes, M. da. (1988). The Idea of limpieza in {\textquotedblleft}La Celestina{\textquotedblright}. En J. V. Ricapito (Ed.), \textit{Hispanic studies in honor of Joseph H. Silverman} (pp. 23--36). Madrid: Juan de la Cuesta.

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