@article{153747,
      note = {Outgrowth of a symposium held during the 4th International  Congress of Systematic and Evolutionary Biology in College  Park, Md., May 1990.},
      author = {Harrison, Richard G.},
      url = {http://library.usi.edu/record/153747},
      title = {Hybrid zones and the evolutionary process /},
      publisher = {Oxford University Press,},
      recid = {153747},
      pages = {x, 364 p. :},
      address = {New York :},
      year = {1993},
}