1. Bartholic, J. F., Hanover, J., Tombaugh, L., Downey, K. W., Hawley, M. C., and Koenig, H. (1983),Wood and Agricultural Residues, Soltes, E. J., ed., Academic Press, New York, pp. 529–565.
2. Forest Resources Fact Book. The National Hardwood Lumber Association, Memphis, TN.
3. The Forest Industry of West Virginia (1991), Division of Forestry, West Virginia Deparment of Commerce, Labor, and Environmental Resources, Charleston, WV.
4. 1988 Primary Industry Production of Mill Residue for Kentucky (1991), Division of Forestry, Department of Natural Resources, Frankford, KY.
5. Selected Ohio Forest Product Industry Residue (1990), Ohio State University Cooperative Extension Service, Division of Foresty, Ohio Department of Natural Resources, Columbus, OH.