00489naa#a2200157#i#450# EN\RIOR\bibl\10840 20241127093241.3 2409-5087 20160401b2016####ek#y0engy0150####ca RUS RU THE EVOLUTION OF THE PROFESSIONAL ADMINISTRATOR’S STATUS IN MEDIEVAL RUSSIA ON AN EXAMPLE OF THE BOYAR DUMA Journal article Moscow Publishing Center RIOR 2016 7 с. Journal article local riorpub.com