@book{78435,
	author = {Mech, L. David and Frenzel, Louis Daniel},
	title = {Ecological Studies of the Timber Wolf in Northeastern Minnesota},
	publisher = {Project Gutenberg,},
	year = {2011},
	series = {USDA Forest Service Research Paper NC-52},
	address = {Salt Lake City, UT :},
	note = {Release date is 2011-10-02},
	url = {https://www.gutenberg.org/ebooks/37595}
}