@article{93343,
      author = {Hansen, Peter S.},
      url = {http://library.usi.edu/record/93343},
      title = {An introduction to twentieth century music},
      publisher = {Allyn and Bacon},
      recid = {93343},
      pages = {xiii, 450 p.},
      address = {Boston,},
      year = {1971},
}