00489naa#a2200157#i#4500001001900000005001700019011001400036100004100050101000800091102000700099200013100106210004100237215001000278608002700288856001600315EN\RIOR\bibl\1084020241127093657.3##a2409-5087##a20160401b2016####ek#y0engy0150####ca0#aRUS##aRU1#aTHE EVOLUTION OF THE PROFESSIONAL ADMINISTRATOR’S STATUS IN MEDIEVAL RUSSIA ON AN EXAMPLE OF THE BOYAR DUMAeJournal article1#aMoscowcPublishing Center RIORd2016##a7 с.##aJournal article2local4#ariorpub.com