1. Acton DF, Padbury GA, Stushnoff C (1998) The ecoregions of Saskatchewan. Canadian Plains Research Center, University of Regina, Regina
2. Asouti E, Austin P (2005) Reconstructing woodland vegetation and its exploitation by past societies, based on the analysis and interpretation of archaeological wood charcoal macro-remains. Environ Archaeol 10:1–18
3. Bassett IJ, Crompton CW, Parmelee JA (1978) An atlas of airborne pollen grains and common fungus spores of Canada (Research Branch, Canada Department of Agriculture, Monograph 18). Research Branch, Canada Department of Agriculture, Ottawa
4. Birks HJB, Gordon AD (1985) Numerical methods in quaternary pollen analysis. Academic Press, Orlando
5. Brandt JP (2009) The extent of the North American boreal zone. Environ Rev 17:101–161