Ekhjargal, O., Bumtsend, B. and Tovuudorj, R. 2022. Landform classification based on topographic position Index: (A case study in Ulaanbaatar city). Mongolian Journal of Geography and Geoecology. 59, 43 (Dec. 2022), 218–226. DOI:https://doi.org/10.5564/mjgg.v59i43.2530.