@book {23899,
	title = {Past and present vegetation of the Far Northwest of Canada},
	year = {1984},
	pages = {1-251},
	address = {Toronto ; Buffalo : University of Toronto Press},
	keywords = {Canada, flora, north west, past, present, vegetation},
	isbn = {0802025234; 9780802025234},
	author = {Ritchie, James Cunningham}
}
