Duangwichian, Chayada, Sirirat Pumpuang, Kanokwan Sudakaew, Adirek Wangsang, Wasan Mudmod, Chumlong Chukorn Chukorn, and Jutamas Gatewong. 2014. “Yield Trial of Oil Palm Varieties in Pathum Thani Province”. Thai Agricultural Research Journal 32 (1):45-57. https://doi.org/10.14456/thaidoa-agres.2014.23.