@article {27570,
	title = {Holocene vegetation of the northwestern precincts of the glacial Lake Agassiz basin. In : W. J. Mayer-Oakes (ed.) Life, land and water},
	year = {1967},
	pages = {217-229},
	institution = {University of Manitoba Press},
	address = {Winnipeg},
	author = {Ritchie, J.C.}
}
