@article{313756,
      author = {Ward, Peter D.},
      url = {http://library.usi.edu/record/313756},
      title = {Out of thin air : dinosaurs, birds, and Earth's ancient  atmosphere /},
      publisher = {J. Henry Press,},
      abstract = {Discusses the effect of changing oxygen levels in Earth's  atmosphere on evolution and mass extinctions, and presents  the theory that saurischian dinosaurs were able to weather  two mass extinctions because of a new, more efficient  respiratory system, which was in turn inherited by their  descendants the birds.},
      recid = {313756},
      pages = {xiii, 282 p. :},
      address = {Washington, D.C. :},
      year = {2006},
}