✓

@Book{            book:1284096,
  Author        = "Bird, Richard",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  ISBN          = "1107087201,9781107087200,1107452643,9781107452640",
  Publisher     = "Cambridge University Press",
  Title         = "Thinking functionally with Haskell",
  URL           = "http://gen.lib.rus.ec/book/index.php?md5=D53358BA303D12AF0FB6EC7010C27CCD",
  Year          = "2014",
  bdsk-url-1    = "http://gen.lib.rus.ec/book/index.php?md5=D53358BA303D12AF0FB6EC7010C27CCD",
  File          = "Bird, Richard - Thinking Functionally with Haskell (2015, Cambridge University Press) (0) - a - a.pdf",
  file-2        = "Richard Bird - Thinking functionally with Haskell (2014, Cambridge University Press) (0) - a - a.epub"
}

@Book{ book:1284096, Author = "Bird, Richard", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", ISBN = "1107087201,9781107087200,1107452643,9781107452640", Publisher = "Cambridge University Press", Title = "Thinking functionally with Haskell", URL = "http://gen.lib.rus.ec/book/index.php?md5=D53358BA303D12AF0FB6EC7010C27CCD", Year = "2014", bdsk-url-1 = "http://gen.lib.rus.ec/book/index.php?md5=D53358BA303D12AF0FB6EC7010C27CCD", File = "Bird, Richard - Thinking Functionally with Haskell (2015, Cambridge University Press) (0) - a - a.pdf", file-2 = "Richard Bird - Thinking functionally with Haskell (2014, Cambridge University Press) (0) - a - a.epub" }