) and Valdai plateau, which may be taken as the true source of the stream. The highest ridges of the Valdai scarcely rise 220 feet above the plateau, although the chief crest, the Popova Gora, attains an altitude of 1,170 feet. The mean elevation of the...
The Earth and Its Inhabitants: The northeast Atlantic. Islands of the North ... - Pagina 340
di Jean Jacques Élisée Reclus - 1876
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