On the influence of the external nature on the social relations of individual peoples and the history of mankind //.Pocket book ...

BER, KMOn the influence of the external nature on the social relations of individual peoples and the history of mankind / [cit.] Of action.Member KMBair background.- P. 195-235.- // Pocket book for land lovers, published from Russian geographical society.1848. - St. Petersburg: Type.II departures of his own.E. I. V. Office, 1849.Electronic Source: PB