Oil Palm Bulletin No. 11 (November 1985) p13 - 18
Synthetic zeolites and its potential applications in fuel production in palm oil industry
T.L Ooi and A.S.H. Ong

Oil Palm Bulletin No. 10 (May 1985) p1 - 9
Volatilisation losses of nitrogen from urea applied to Malaysian soils 1.Effect of application rate and the admixture of other fertilisers
FOSTER, H L tan