@article{434393,
      note = {"Supplement": p. xi-xxx.},
      author = {Ewen, David,},
      url = {http://library.usi.edu/record/434393},
      title = {Encyclopedia of the opera.},
      publisher = {Hill and Wang},
      recid = {434393},
      pages = {xxx, 594 p.},
      address = {New York,},
      year = {1963},
}