1. Management of Palm Oil Industrial Wastes in Malaysia;Ma,1988
2. Organic Waste Recycling;Polprasert,1989
3. Oil Palm and the Environment;Singh,1999
4. Biogas Plants Treating Palm Oil Mill Effluent in Malaysia;Anon,1995
5. Complete reclamation of palm oil wastes;Tay;Resources Conversion Recycling,1991