Surasak Nilnond, & Choopong Sukumalanandana. (1988). The Improvement of Grape Quality and Production : Fruiting Responses of Some Grape Varieties to Gibberellic Acid. Agriculture and Natural Resources, 22(3), 229–237. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/242364