1930-2013 authors biography civilization comparativegrammar congresses dialects foreignspeakers history historyandcriticism intellectuallife jewishinfluences jews languageandliterature lexicology pokrovskiĭ russian russianlanguage russianliterature scienceoflanguage(linguistics) semantics shmelev slavic slaviclanguages slavicphilology sociallifeandcustoms sofronova studyandteaching style софронова