@article{63945,
      author = {Errington, Paul L.},
      url = {http://library.usi.edu/record/63945},
      title = {Muskrat populations.},
      publisher = {Iowa State University Press},
      recid = {63945},
      pages = {x, 665 p.},
      address = {Ames,},
      year = {1963},
}