Yazva

The Yazva (Russian: Я́зьва; Komi: Ёдз, Yodz ) is a river in Perm Krai, Russia. It is a left tributary of the Vishera. It flows through the south part of the Krasnovishersky District and enters the Vishera downstream of the town of Krasnovishersk, 73 km from its confluence with the Kama. The Yazva is 162 km long, and its drainage basin covers 5900 km2. Traditionally, Komi-Yazva, a Finno-Ugric language, has been spoken in the river basin.

Tributaries
The main tributaries of the Yazva are, from source to mouth:
 * Left: Molmys, Mel, Glukhaya Vilva, Kolynva
 * Right: Kolchim