Knutsen, Gregory A., U.S. Fish and Wildlife Service, Long Lake National Wildlife Refuge Complex, 12000 353rd Street SE, Moffit, North Dakota 58560, United States

• The Canadian Field-Naturalist Vol. 121 No. 1 (2007) - Articles
  Pattern and Potential Causes of White-faced Ibis, Plegadis chihi, Establishment in the Northern Prairie and Parkland Region of North America
  Abstract  PDF