Boito
A Biographical Dictionary of Freethinkers of All Ages and Nations · 1889 · p. 22
(Arrigo), Italian poet and musician, b. at Padua, whose opera “Mefistofele,” has created considerable sensation by its boldne .
Bu kavram başka kaynaklarda da geçiyor
Music Lover's Encyclopedia (1939)
Dictionary of Musicians (1910)
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