Proceedings of the Soils Science Conference of Malaysia 2008: Sustaining Soil Ecosystems with Emphasis on Coastal Soils: Perak (Malaysia), 15-17 Apr 2008, p. 15-17
Proceedings of the Workshop on Phosphate Sources for Acid Soils in the Humid Tropics of Asia, Rubber Research Inst. of Malaysia, Kuala Lumpur (Malaysia): Kuala Lumpur (Malaysia), 6-7 Nov 1990, p. 117-133