1. Energy Potential from Organic Wastes; A Review of the Quantities and Sources (U. S. Department of the Interior, Bureau of Mines Information Circular 8549, Washington, D. C. 1972).
2. Energy from Agricultural Products, Ed. (American Society of Agronomy, Washington, D. C., 1973), special publication No. 33, p. 32.
3. et al., ?Grown organic matter as a fuel raw material resource,? prepared for Lewis Research Center by Ohio Agriculture Research and Development Center, Wooster, Ohio, 1975.
4. ?Biomass potential from agriculture production?, in Process Biomass-A Cash Crop for the Future? (Midwest Research Institute and Battelle Columbus Laboratory, Kansas City, MO, 1977).