Poungsuk, P., Piyanard, J., Nitikorn, J. The problems and obstructions on teaching and learning of agricultural subject of agricultural teachers in Secondary School in Northeast Region of Thailand. Int. J. Agric. Tech. [internet]. 2015 Feb. 20 [cited 2025 Aug. 7];11(2):459-71. available from: https://li04.tci-thaijo.org/index.php/IJAT/article/view/6265