Mohd. Nor Mohd. Yusoff, L. T. Chew, Abdul Razak Mohd. All, and Nurulhuda Mohd. Nasir. “/Em>”;. Journal of Tropical Forest Science (JTFS), vol. 2, no. 2, Dec. 1989, pp. 104-9, https://jtfs.frim.gov.my/jtfs/article/view/2091.