@article{156293,
      recid = {156293},
      title = {Trends in duck breeding populations [microform].},
      publisher = {U.S. Fish and Wildlife Service, Office of Migratory Bird  Management,},
      address = {Laurel, MD :},
      pages = {v. :},
      note = {"Administrative report."},
      url = {http://library.usi.edu/record/156293},
}