Yang Y, Phromphithakkul W. Factors Influencing Air Pollution Control of Beijing-Tianjin-Hebei Region in China. IJSASR [Internet]. 2023 Mar. 2 [cited 2026 Nov. 7];3(2):15-28. Available from: https://so07.tci-thaijo.org/index.php/IJSASR/article/view/2361