Bhalakula, Anucha, Siripen Sudsansanga, Apichaya Ruechai, Nirawan Thongmee, and Dawnapa Kettong. 2021. “DEVELOPMENT OF HAT CHAO SAMRAN SUBDISTRICT MUNICIPALITY: UPGRADING THE QUALITY OF LIFE OF THE PEOPLE IN SOCIAL, ECONOMIC AND POLITICAL ASPECTS ACCORDING TO THE CONCEPT OF GEOPOLITICS, SPATIAL DEVELOPMENT”. Journal of MCU Phetchaburi Review 4 (2):33-53. https://so03.tci-thaijo.org/index.php/JPR/article/view/256240.