@article{472827,
      note = {"National Academy of Sciences."},
      author = {Fitch, Walter M., and Ayala, Francisco José,},
      url = {http://library.usi.edu/record/472827},
      title = {Tempo and mode in evolution genetics and paleontology 50  years after Simpson / [electronic resource] :},
      publisher = {National Academy Press,},
      recid = {472827},
      pages = {viii, 325 p. :},
      address = {Washington, D.C. :},
      year = {1995},
}