@BOOK{L1,
  AUTHOR	    = {John Doe},
  TITLE		    = {Title 1},
  YEAR		    = {1995},
}

@BOOK{L2,
  AUTHOR	    = {John Doe},
  TITLE		    = {Title 1},
  YEAR		    = {1996},
}

@BOOK{L3,
  TITLE		    = {Title 2},
  YEAR		    = {1995},
}

@BOOK{L4,
  TITLE		    = {Title 2},
  YEAR		    = {1995},
}

@BOOK{L5,
  TITLE		    = {Title 1},
  YEAR		    = {1995},
}

@BOOK{L6,
  SHORTTITLE        = {Title A},
  TITLE		    = {Title 3},
  YEAR		    = {1995},
}

@BOOK{L7,
  TITLE		    = {Title A},
  YEAR		    = {1995},
}

@BOOK{L8,
  AUTHOR            = {Billy Brown},
  TITLE		    = {Title A},
  YEAR              = {1934}
}

@BOOK{L9,
  AUTHOR            = {Billy Brown},
  TITLE		    = {Title B},
  YEAR              = {1932}
}

@BOOK{L10,
  AUTHOR            = {Clive Cautious},
  TITLE		    = {Title A},
  YEAR              = {1946}
}

@BOOK{L11,
  TITLE		    = {Titular Titilation},
  YEAR              = {1946}
}

@BOOK{L12,
  YEAR              = {1943}
}



