Ogino, K., Sabhasri, S. and Shidei, T. (1964) “The Estimation of the Standing Crop of the Forest in Northeastern Thailand”, Agriculture and Natural Resources. Bangkok, Thailand, 4(3&4), pp. 67–78. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240121 (accessed: 18 September 2026).