Bradley, D. P., & Lothner, D. C. (1987). Achieving wood energy potentials: Evidence in Northeastern Minnesota. North Central Forest Experiment Station.

Bradley, Dennis P., and David C. Lothner. Achieving Wood Energy Potentials: Evidence in Northeastern Minnesota. Minnesota: North Central Forest Experiment Station, 1987.

Bradley, Dennis P., and David C. Lothner. Achieving Wood Energy Potentials: Evidence in Northeastern Minnesota. North Central Forest Experiment Station, 1987.