1. Advisory Committee on Technology Innovations, Supplementary Report, Renewable Sources and Alternate Technologies for Developing Countries;Anon,1981
2. A company of MBB jointly developed a biogas plant;Brand;Scala,1981
3. Production and use of methane from animal waste in Taiwan;Chung,1973
4. Methane production by anaerobic digestion of water hyacinth;Donald,1980
5. Bio-Gas Plants Farm Bulletin;Idnani,1963