1. Biotechnology and exploitation of algae. The Indian approach;Becker,1982
2. Biogas plants—Prospects and limitation;Biswas;Invention intelligence,1977
3. Laboratory methods in food and dairy microbiology;Harrigan,1976
4. Anaerobic digestion of piggery and poultry waste;Hobson,1980
5. Methane production from agricultural and domestic wastes;Hobson,1981