Kydyrova A, Zandybay A, Onay TT, Nuriya A, Assyltas S. Regional variations and geostatistical mapping of soil contamination by heavy metals in Astana city. ijirss [Internet]. 2025 Aug. 27 [cited 2025 Dec. 9];8(6):209-22. Available from: http://www.ijirss.com/index.php/ijirss/article/view/9527