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Fritts, S. H., and L. D. Mech.  1981.  Dynamics, movements, and feeding 	
      ecology of a newly protected wolf population in northwestern Minnesota.  
      Wildlife Monograph 80.
      
Fuller, T. K. 1989.  Population dynamics of wolves in north-central Minnesota.  
      Wildlife Monograph 105.

Mech, L. D.  1970.  The Wolf: The ecology and behavior of an endangered 
      species.  Natural History Press, Doubleday Publishing Company, New York.  

Mech, L. D.  1986.  Wolf population in the central Superior National 	
      Forest, 1967-1985.  U.S. Forest Service Research Paper NC-270. 

Mech, L. D., and L. D. Frenzel, Jr.  1971.  Ecological studies of the
      timber wolf in northeastern Minnesota.  U.S. Forest Service Research 
      Paper NC-52. 
 	
Nudds, T. E.  1978.  Convergence of group size strategies by mammalian 	
      social carnivores.  American Naturalist 112:957-960.

Stenlund, M. H.  1955. A field study of the timber wolf (Canis lupus) on the 
      Superior National Forest, Minnesota.  Minnesota Department of
      Conservation Technical Bulletin 4, St. Paul.
      
Stewart, J. E.  1999. Anxious encounter.  International Wolf 9(3):21-22.

Van Ballenberghe, V., A. W. Erickson, and D. Byman.  1975.  Ecology of the 
      timber wolf in northeastern Minnesota.  Wildlife Monograph 42.

Wisconsin Department of Natural Resources.  1999.  Wisconsin Wolf Management 
      Plan Draft.  Madison, Wisconsin.