@misc{Berg_Lev_Semenovič_(1876–1950)._Autor_Očerki_1949,
 author={Berg, Lev Semenovič (1876–1950). Autor},
 copyright={Public Domain},
 address={Moskva},
 address={Leningrad},
 journal={Itogi i Problemy Sovremennoj Nauki},
 howpublished={online},
 year={1949},
 publisher={Izd-vo Akademii Nauk SSSR},
 language={rus},
 title={Očerki po istorii russkih geografičeskih otkrytij},
 type={Text},
 URL={http://www.rcin.org.pl/igipz/Content/167475/PDF/WA51_183751_PTG1317-r1949_Ocerki-po-istorii.pdf},
 keywords={Russian geographical discoveries},
}