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Mohd. Napi Daud, . and Nayagam J., . and Veramuthoo P., . Effects of selected environmental and technological factors on rubber production - A case study of RRIM economic laboratory. pp. 66-74. ISSN 0127-7065
Mohd Napi Daud, . and Nayagam J., . and Veramuthoo P., . Effects of selected environmental and technological factors on rubber production - a case study of RRIM Rubber Research Inst. Malaysia Economic Laboratory. pp. 66-74. ISSN 0127-7065
Nayagam J., . and Johari Hassan, . Labour productivity in selected estates Hevea plantations: a case study in Peninsular Malaysia. pp. 127-130.
Nayagam J., . and Mohd Yusof Shahabuddin, . Trend in labour utilisation in the estates of Peninsular Malaysia - a review. pp. 14-19. ISSN 0032-096X