Water quality analysis of tuul river around the Ulaanbaatar city area. Himi, him. tehnol. hùrèèlèngijn èrdèm šinžilgèènij bùtèèl [Internet]. 2021 Dec. 30 [cited 2026 Jun. 25];4(9):33-9. Available from: https://mongoliajol.info/index.php/BICCT/article/view/1816