@article{406496,
      author = {Ayala, Francisco José, and Fitch, Walter M., and Clegg,  Michael T.,},
      url = {http://library.usi.edu/record/406496},
      title = {Variation and evolution in plants and microorganisms  toward a new synthesis 50 years after Stebbins /  [electronic resource] :},
      publisher = {National Academy Press,},
      recid = {406496},
      pages = {xi, 340 p. :},
      address = {Washington, D.C. :},
      year = {2000},
}