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Lim C.K., . and Lau C.H., . and Mohd Napi D., . (1997) Preliminary study of three methods for simultaneous determination of soil nitrogen and phosphorus. [Proceedings Paper]
Lau C.H., . and Lim C.K., . and Mohd Napi Daud, . Comparison of three methods for determination of total nitrogen in fertilisers for Hevea. pp. 33-39. ISSN 0127-7065
Lim C.K., . and Lau C.H., . Determination of total aluminium iron and silicon in soils under rubber in Malaysia by acid dissolution technique. pp. 213-219. ISSN 0127-7065