✓

@Book{            BerlekampConwayGuy,
  Author        = "Berlekamp, Elwyn R. and Conway, John and Guy, Richard K.",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:27 +0200",
  Edition       = "2nd",
  Publisher     = "A K Peters",
  Title         = "Winning Ways for Your Mathematical Plays",
  Year          = "2003",
  File          = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (0) (0) - a - a.pdf",
  file-2        = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (1) (0) - a - a.pdf",
  file-3        = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (2) (0) - a - a.pdf",
  file-4        = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (3) (0) - a - a.pdf"
}

@Book{ BerlekampConwayGuy, Author = "Berlekamp, Elwyn R. and Conway, John and Guy, Richard K.", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:27 +0200", Edition = "2nd", Publisher = "A K Peters", Title = "Winning Ways for Your Mathematical Plays", Year = "2003", File = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (0) (0) - a - a.pdf", file-2 = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (1) (0) - a - a.pdf", file-3 = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (2) (0) - a - a.pdf", file-4 = "Winning Ways for Your Mathematical Plays - Berlekamp, Conway, Guy (3) (0) - a - a.pdf" }