Suksikeung, Prachim, Lert Chuntanaparb, Choob Khemnark, and Sutat Sriwatanaponge. 1975. “Clonal Variation and Inheritance in Growth Characteristics of Teak (Tectona grandis L.)”. Agriculture and Natural Resources 9 (1). Bangkok, Thailand:1-11. https://li01.tci-thaijo.org/index.php/anres/article/view/240706.