1. Compendium, biogas plants in Europe — A practical handbook;Demuynck,1984
2. The use of anaerobic digester effluent as a fertiliser;Etheridge;Final report to E.T.S.U.,1983
3. Limits to process intensity in methane (biogas/generator) systems;Franco;Final report to E.T.S.U.,1981
4. Research and Development in anaerobic digestion of organic wastes and plant matter;Hamworthy Engineering Ltd.;Final report to E.T.S.U.,1984
5. A large farm scale digester at Pittrichie Pig Unit, Aberdeenshire;Hobson;Final report to E.T.S.U.,1983