#book_binding__binding__cover__back  the front and back covering of a book; "the book had a leather binding"
  supertype:  protective_cover__protective_covering__protection  a covering that is intend to protect from damage or injury; "they had no protection from the fallout"; "wax provided protection for the floors"
  subtype:  half_binding  three-quarter_binding
  part of:  book.artifact__volume  (books as a physical objects) a number of pages bound together; "he used a large book as a doorstop"

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