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แสงทามาตย์พ, สอนนาป, อินทชัยพ. The Comparison of Cost and Return Dried and Boiled Rock salt in Ban Chai Sub-District, Ban Dung District, Udon Thani Province. Journal of Roi Et Rajabhat University [Internet]. 29Apr.2019 [cited 22Oct.2019];13(1):151-6. Available from: https://www.tci-thaijo.org/index.php/reru/article/view/186030