The struggle for land

The struggle for the Earth: (inductive-statistical research) / N. Bykhovsky, V. Vovchk, N. Oganovsky, etc.;At near.Participation of K. Kachorovsky.- [St. Petersburg: B. and.], 1908. -.I. Fortunatova, Evg. II.Chernenkov, Bor .. III.Oganovsky, n .. IV.Bykhovsky, N .. V. Vovchok, in .. VI.Kachorovsky, K..1.Power (collection).Electronic copy source: PBOriginal storage: St. Petersburg State University