According to the Big Soviet Encyclopedia "The question of the natural boundaries of Pamir is debatable. Normally Pamir is regarded as covering the territory from Trans-Alay Range to the north, Sarykol Range to the east, Lake Zorkul, Pamir River, and the upper reaches of Panj River to the south, and the meridional section of the Panj valley to the west; to the north-west Pamir includes the eastern parts of Peter the Great and Darvaz ranges."
