T.J.B. Boyle, C. Liengsiri and C. Piewluang 1991. GENETIC STUDIES IN A TROPICAL PINE - <em>PINUS</em> <em>KESIYA</em> III. THE MATING SYSTEM IN FOUR POPULATIONS FROM NORTHERN THAILAND. Journal of Tropical Forest Science (JTFS) . 4, 1 (Sep. 1991), 37–44.