✓

@Book{            book:1284417,
  Author        = "Koehler, John O",
  date-added    = "2020-06-14 09:01:21 +0200",
  date-modified = "2020-06-14 09:01:21 +0200",
  ISBN          = "0813337445,9780813337449",
  Publisher     = "Westview Press",
  Title         = "Stasi: The Untold Story Of The East German Secret Police",
  URL           = "http://gen.lib.rus.ec/book/index.php?md5=52c144d5821445b83a06d5028df3665e",
  Year          = "2000",
  bdsk-url-1    = "http://gen.lib.rus.ec/book/index.php?md5=52c144d5821445b83a06d5028df3665e",
  File          = "Stasi The Untold Story Of The East German Secret Police by John O Koehler (z-lib.org) - a.epub"
}

@Book{ book:1284417, Author = "Koehler, John O", date-added = "2020-06-14 09:01:21 +0200", date-modified = "2020-06-14 09:01:21 +0200", ISBN = "0813337445,9780813337449", Publisher = "Westview Press", Title = "Stasi: The Untold Story Of The East German Secret Police", URL = "http://gen.lib.rus.ec/book/index.php?md5=52c144d5821445b83a06d5028df3665e", Year = "2000", bdsk-url-1 = "http://gen.lib.rus.ec/book/index.php?md5=52c144d5821445b83a06d5028df3665e", File = "Stasi The Untold Story Of The East German Secret Police by John O Koehler (z-lib.org) - a.epub" }