@article{54956,
      note = {"Facsimile of 1944 edition."},
      author = {Simpson, George Gaylord,},
      url = {http://library.usi.edu/record/54956},
      title = {Tempo and mode in evolution.},
      publisher = {Hafner Pub. Co.,},
      recid = {54956},
      pages = {xviii, 237 p.},
      address = {New York,},
      year = {1965},
}