CHANDRKRACHANG, Suwalee, Penjai SOMPONGCHAIYAKUL, and Suvitchai SANGTAIN. 2022. “Profitable Spin-off from Using Chitosan in Orchid Farming in Thailand”. Journal of Metals, Materials and Minerals 15 (1). Bangkok, Thailand:45-48. https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1478.