Promsiridet, Teeramet, Chonthicha Radapong, Natthida Kanbanchong, Benyathip Khaisang, and Supaporn Simmathong. 2026. “Contract Farming and the Study of Maize Cultivation Dynamics Ban Tha Ngam, Huai Aeng Subdistrict, Mueang District, Maha sarakham Province, 1967-2025”. Journal of Social Science Kamphaeng Saen 1 (1):146-58. https://so17.tci-thaijo.org/index.php/JSSK/article/view/1716.