@article {31561,
	title = {Plant survival in Beringia and in refugia along the Canadian Rocky Mountains during Pleistocene glaciation as suggested by present bryophyte distribution patterns. In : American Quaternary Association Abstracts of the Fifth Biennial Meeting, September 2-4},
	year = {1978},
	author = {Vitt, D. H. and Horton, D. G.}
}
