Não informado. (1931). Journal of the Rubber Research Institute of Malaya. Rubber Research Institute of Malaysia.
Chicago-viite (17. p.)Não informado. Journal of the Rubber Research Institute of Malaya. Kuala Lumpur: Rubber Research Institute of Malaysia, 1931.
MLA-viite (8. p.)Não informado. Journal of the Rubber Research Institute of Malaya. Rubber Research Institute of Malaysia, 1931.
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