@article{329491,
      recid = {329491},
      author = {Lewis, John S.},
      title = {Rain of iron and ice : the very real threat of comet and  asteroid bombardment /},
      publisher = {Addison-Wesley Pub. Co.,},
      address = {Reading, Mass. :},
      pages = {xi, 240 p. :},
      year = {1997},
      url = {http://library.usi.edu/record/329491},
}