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Hasan Yonnes, . and Turner P.D., . The comparative inportance of different oil palm tissues as infection sources for basal stem rot in replantings. pp. 119-135. ISSN 0126-575X
Bakri A.H., . and Redshaw M.J., . and Sembiring P., . and Turner P.D., . (1988) Low volume herbicide usage - field problems and their solution. [Proceedings Paper]
Kartika D., . and Soebagyo F.X., . and Turner P.D., . and Breure C.J., . (1986) Severe stem bleeding and frond fracture of MAWA hybrid coconuts in North Sumatra. [Proceedings Paper]
Bakri A.H., . and Sembiring P., . and Redshaw M.J., . and Turner P.D., . (1986) Recent developments in controlled droplet application of herbicides on estates. In: 2. International Conference on Plant Protection in the Tropics, 17-20 Mar 1986, Genting Highlands (Malaysia).