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Bellini, V., West, W., & Romani, F. (1840). Norma: A lyric tragic opera in two acts (Duncombe's ed.). Printed and published by J. Duncombe.

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Bellini, Vincenzo, W. West, and Felice Romani. Norma: A Lyric Tragic Opera in Two Acts. Duncombe's ed. London: Printed and published by J. Duncombe, 1840.

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Bellini, Vincenzo, et al. Norma: A Lyric Tragic Opera in Two Acts. Duncombe's ed. Printed and published by J. Duncombe, 1840.