00507naa#a2200169#i#450# EN\INFRA-M\bibl\13196 20240504064954.6 2500-3305 20160725b2016####ek#y0engy0150####ca RUS RU Topical issues of preparation for the unified state exam in social studies Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Titova Elena Nikolaevna naukaru.ru