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Acknowledgments
For invaluable assistance I thank the following individuals and organizations: Tom English (Bell Museum, University of Minnesota, Minneapolis); Mark R. Fuller (Patuxent Wildlife Research Center, Laurel, MD); J. A. Gessaman, Utah State University, Logan, UT; David Gill (Vertebrate Ethology Section, Canadian Museum of Nature, Ottawa, ON); David H. Johnson (Oregon Cooperative Wildlife Research Unit, Oregon State University, Corvallis); Paul N. Kerlinger (Cape May Bird Observatory, Cape May Point, NJ); Lloyd F. Kiff (Western Foundation of Vertebrate Zoology, Los Angeles); Jean Parmelee (Bell Museum, University of Minnesota); Susan M. Sivard (New York Historical Society, New York, NY); and Gary A. Voelker (Bell Museum, University of Minneapolis).
Parmelee, David F. 1992. Snowy Owl (Bubo scandiacus), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/010