1. The U.S. Landfill Gas Resource: Low-Cost Biogas from Municipal Solid Waste;Bogner;Technical Memorandum: Argonne National Laboratory ANL/CNSV-TM-206,1988
2. Turning dairy wastes into power and profits;Williams;Dairy Herd Management,1989
3. Nutritional Ecology of the Ruminant;Van Soest,1987
4. Engineering Design Considerations for Methane Fermentation of Energy Crops;Jewell;Cornell University Annual Report, First Year,1985
5. Engineering Design Considerations for Methane Fermentation of Energy Crops;Jewell;Cornell University Annual Report, Second Year,1985