Dr. Thirachaya Chaigasem, Amarawadee Kumboon (2020) “Frontier Tourism in the pattern of Twin Cities located in Thailand and Lao People’s Democratic Republic on Structural Model ”, PalArch’s Journal of Archaeology of Egypt / Egyptology, 17(9), pp. 5416 - 5433. Available at: https://www.archives.palarch.nl/index.php/jae/article/view/5012 (Accessed: 16April2024).