DescriptionObwatershed.png English: This is a map of the Ob River Watershed (at the confluence with the Irtysh river). Created based on USGS data. Date
English: This is a map of the Ob River Watershed (at the confluence with the Irtysh). Russia. Esperanto: La mapo de akvodislimo de rivero Obo (ĉe kunfluejo
DescriptionLake Chebarkul in Obwatershed.png English: Lake Chebarkul located approximately in the Ob River watershed. Adapted from Obwatershed.png. Date 17 February