Proceedings of the 2000 3rd National Seminar on ISO 14000 Series of Environmental Management Standards for Palm Oil and Related Industries: Selangor (Malaysia), 10 Aug 2000, p. 141-169
Proceedings of The National Seminar on Mechanization in Oil Palm Plantation: Towards Improving Productivity Through Mechanization: Selangor (Malaysia), 30 Jun-1 Jul 1998, p. 61-68