กล้องแก้ว ณ. RETURN COST OF RICE CULTIVATION OF FARMERS IN NON THAI DISTRICT, NAKHONRACHASIA PROVINCE. ptujournal [internet]. 2021 Jun. 30 [cited 2026 Sep. 24];13(1):185-92. available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/249423