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https://ivannikitin.com/2008/11/09/d1-8d-d0-bb-d0-b5-d0-ba-d1-82-d1-80-d0-be-d0-bd-d0-bd-d1-8b-d0-b5-d0-ba-d0-bd-d0-b8-d0-b3-d0-b8-epub-vs-fb2/
Электронные книги ePUB vs. FB2