Book monuments on the websites of national libraries of the republics of the subjects of the Russian Federation in the context of digitalization: to raise the question

The article presents the results of studying the electronic resources of book monuments on the websites of national libraries of the constituent entities of the Russian Federation in the context of digitalization. The composition of regional collections of book monuments was considered and the peculiarities of the thematic and chronological formation of digital registers “Book Monuments Funds”, “Book Monuments-Collections”, “Single Book Monuments” included in the regional collection of book monuments were identified.