@booklet {18056,
	title = {Mammals and life zones of Oregon},
	howpublished = {North American Fauna},
	number = {55},
	year = {1936},
	note = {"June, 1936"  Map in front pocket.  Good photographs.  Issued by U.S. Department of Agriculture, Bureau of Biological Survey},
	publisher = {Government Printing Office},
	address = {Washington, DC},
	keywords = {abundance, biological, birds, climate, general, general ecosystem description, geographical distribution, terrestrial mammals, terrestrial vegetation},
	url = {https://archive.org/details/mammalsandlifezo00bailrich},
	author = {Bailey, Vernon}
}
