@article{61548,
      note = {Includes index.},
      author = {John, Fritz,},
      url = {http://library.usi.edu/record/61548},
      title = {Partial differential equations /},
      publisher = {Springer-Verlag,},
      recid = {61548},
      pages = {viii, 250 p. :},
      address = {New York :},
      year = {1975},
}