Kongrit C, Siripunkaw C. Determination of age and construction of population age structure of wild Asian elephants based on dung bolus circumference. TJVM [Internet]. 2017 Jun. 21 [cited 2024 Apr. 20];47(2):145-53. Available from: https://he01.tci-thaijo.org/index.php/tjvm/article/view/90293