Peterson, R. O. 1974. Wolf ecology and prey populations on Isle Royale. Unpubl. Ph.D. Dissertation, Purdue Univ., Lafayette, Ind. 368 p. Phillips, R. L., and L. D. Mech. 1970. Homing behavior in a red fox. J. Mammal. 51:621. Pimlott, D. H. 1967. Wolf predation and ungulate populations. Amer. Zool. 7:267-278. Pimlott, D. H., J. A. Shannon, and G. B. Kolenosky. 1969. The ecology of the timber wolf in Algonquin Park. Ont. Dept. Lands and Forests. Res. Rep. (Wildlife) No. 87. 92 p. Rausch, R. A. 1967. Some aspects of the population ecology of wolves, Alaska. Am. Zool. 7:253-265. Schenkel, R. 1947. Expression studies of wolves. Behaviour 1:81-129. (Translation from German by Agnes Klasson). Seal, U. S., A. W. Erickson, J. G. Mayo. 1970. Drug immobilization of the Carnivora. Int. Zoo Yearbook 10:157-170. Seal, U. S., L. D. Mech, and V. Van Ballenberghe. 1975. Blood analyses of wolf pups and their ecological and metabolic interpretation. J. Mammal. 56:64-75. Spencer, J. S., Jr., and R. E. Pfeifer. 1966. The growing timber resource of Michigan--1966. Unit 2--the Western Upper Peninsula, Mich. Dept. Nat. Res., Lansing. Stenlund, M. H. 1955. A field study of the timber wolf (_Canis lupus_) on the Superior National Forest, Minnesota. Minn. Dept. Cons. Tech. Bull. No. 4. 55 p. Storm, G. L. 1972. Population dynamics of red foxes in northcentral United States. Ph.D. Thesis, Univ. of Minn., Mpls., 227 p. Thompson, D. Q. 1952. Travel, range, and food habits of Timber Wolves in Wisconsin. J. Mammal. 25:37-43. U. S. Bureau of Census. U. S. Census of Population: 1970. No. of inhabitants. Final Rept. PC(1). Westover, A. L. 1971. The use of a hemlock-hardwood winter yard by white-tailed deer in northern Michigan. Occ. Pap. Huron Mt. Wildl. Found. No. 1. 59 p. Wolfe, M. L., and D. L. Allen. 1973. Continued studies of the status, socialization, and relationships of Isle Royale wolves, 1967 to 1970. J. Mammal. 54:611-635. Woolpy, J. H. 1968. The social organization of wolves. Nat. Hist. 77(5):46-55. Woolpy, J. H., and B. E. Ginsburg. 1967. Wolf socialization: a study of temperament in a wild species. Am. Zool. 7:357-363. _The Audubon Conservation Report series_: No. 1 THE GOLDEN EAGLE IN THE TRANS-PECOS AND EDWARDS PLATEAU OF TEXAS by Walter R. Spofford. 1964. No. 2 THE SUBURBAN WOODLAND/Trees and Insects in the Human Environment by Roland C. Clement and Ian C. T. Nisbet. 1972. No. 3 SOME ENVIRONMENTAL AND ECONOMIC IMPLICATIONS OF THE NATIONAL WATER COMMISSION'S 1972 DRAFT REPORT by Roland C. Clement and Robert K. Davis. 1973. No. 4 PROCEEDINGS OF A CONFERENCE ON PEREGRINE FALCON RECOVERY Edited by Roland C. Clement. 1974.