1. Atlas of United States Trees. Conifers and Important Hardwoods;Little,1971
2. The late Quaternary history of lodgepole and jack pines
3. Silvic of North America;Rudolph,1990
4. Traditional Plant Foods of Canadian Indigenous Peoples. Nutrition, Botany and Use;Kuhlein,1991
5. Wild Plant Use by the Woods Cree (Nihithawak) of East-Central Saskatchewan;Leighton,1985