1. Recycling and utilisation of organic wastes as fertilizers;Gaur,1978
2. Preparation of enriched compost from city solid wastes and its utilisation for plant growth;Talashikar,1983
3. US, State of the art review on the integrated use of anaerobic process in China;Chan;Internal report prepared for IRCWD,1982
4. The development and use of biogas technology in rural areas of Asia;FAO,1981
5. ENEA's activities on advanced anaerobic treatment process;De Poli,1988