@article{211629,
      author = {Bahcall, John N. and Ostriker, J. P.},
      url = {http://library.usi.edu/record/211629},
      title = {Unsolved problems in astrophysics /},
      publisher = {Princeton University Press,},
      recid = {211629},
      pages = {xiv, 377 p. :},
      address = {Princeton, N.J. :},
      year = {1997},
}