1. Standard Methods for the Examination of Water and Wastewater;Anon,1975
2. Biogas Production from Animal Manure;Anon,1978
3. Fundamentals of anaerobic treatment of organic wastes;Buswell;Sewage and Industrial Wastes,1957
4. Anaerobic degradation of dairy manure under mesophilic and thermophilic temperatures;Converse;Trans. Amer. Soc. Engr.,1977