An evaluation of the Christmas Bird Count for monitoring population trends of selected species

@article{Butcher1990AnEO,
  title={An evaluation of the Christmas Bird Count for monitoring population trends of selected species},
  author={Gregory S. Butcher and Mark R. Fuller and Lynne S. McAllister and Paul H. Geissler},
  journal={Wildlife Society Bulletin},
  year={1990},
  volume={18},
  pages={129-134}
}

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