1. L. Berg, L. Cummins, M. Johnson, C Brinck, and G. Cokelet, 1973 : Environmental impact statement on the proposed expansion of Hoerner Waldorl Missoula pulp and paper mill . Hoerner Waldorf Corporation. 69 pp.
2. Sulfur in Plant Materials by Digestion with Nitric and Perchloric Acid1
3. C. E. Carlson, 1978 : Fluoride induced impact on a coniferous forest near the Anaconda aluminum plant in northwestern Montana . Ph. D. dissertation , University of Montana, Missoula, Montana.