A.Pookpakdi, A. Chinchest, S. Laoh siriwong, P. Laosuwan, T. Maolanont, R.J. Lawe, & B.C. Imrie. (1988). Regional and Seasonal Effects on Phenology of Mungbean ( Vigna radiate ( L.) Wilczek ) and Black Gram ( Vigna radiate ( L.) Hepper ) in Thailand. Agriculture and Natural Resources, 22(1), 45–55. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/242331