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Onon River
The
Onon
(, ) is a
river
in
Mongolia
and
Russia
. It is 818 km long and
drains
an area of 94,010 km². It originates at the eastern slope of the
Khentii Mountains
. For 298 km it flows within Mongolia. It joins with
Ingoda River
to produce the
Shilka River
.
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