Palm Oil Engineering Bulletin No.16 (Oct - Dec 1989) p5
Labour shortage in Malaysian oil palm plantations and smallholdings
MALEK Mansoor , ABD RAHIM Shuib

Palm Oil Engineering Bulletin No.14 (Apr - Jun 1989) p4-6
Some challenges and opportunities in the Malaysian oleochemical industry
DE VRIES, Roy J

Palm Oil Engineering Bulletin No.13 (Jan - Mar 1989) p19 - 20
Datasheet – Representative equivalent length in pipe diameter (L/D) of various valves and fittings (crane co.)
LIM Nicholas B H