http://vitaldoc.lgm.gov.my:8060/vital/access/manager/Index en-us 5 Biogas from thermophilic anaerobic contact digestion of palm oil mill effluent http://vitaldoc.lgm.gov.my:8060/vital/access/manager/Repository/vital1:33745 Wed 01 Nov 2017 09:34:26 MYT ]]>