Ob-Irtysh Interfluve  search
BTAsia
 .Ob-Irtysh Interfluve
BTCommonwealth of Independent States
 .Ob-Irtysh Interfluve
RTRussian Federation
 Kazakhstan
 Irtysh River
 Ob River
 Siberian Lowland
SNExtends from source of both rivers in Altai Mountains to their conjunction in the Siberian Lowland. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.