1. Standard Methods for the Examination of Water and Wastewater;APHA,1975
2. Experiences from operating a full size anaerobic digester;Bartlett,1977
3. Biogas generation and uses on livestock farms;Bartlett,1980
4. A note on anaerobic digestion of cattle and poultry waste;Bousfield;Agric. Wastes,1979
5. Effect of temperature on methane fermentation kinetics of beef cattle manure;Chen,1980