books.google.com - Derived from the full Oxford Dictionary of Opera, this is the most authoritative and up-to-date dictionary of opera available in paperback. Fully revised for this new edition with over 3,500 entries, it is designed to be accessible to all those who enjoy opera, whether at the opera-house or at home....http://books.google.com/books/about/The_Concise_Oxford_Dictionary_of_Opera.html?id=WbDbuLJPKBgC&utm_source=gb-gplus-shareThe Concise Oxford Dictionary of Opera
