@article {33021,
	title = {Immobilization of wolves in winter with Etorphine },
	volume = {45},
	year = {1981},
	pages = {271-273},
	publisher = {Journal of Wildlife Management},
	url = {http://links.jstor.org/sici?sici=0022-541X(198907)53\%3A3\%3C654\%3ASPOUCB\%3E2.0.CO\%3B2-I},
	author = {Fuller, T. K. and Keith, L. B.}
}
