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@Book{            calabria1,
  date-added    = "2020-07-23 08:44:44 +0200",
  date-modified = "2020-07-23 08:45:15 +0200",
  Title         = "Reggio Calabria Trekking",
  File          = "reggio calabria trekking - a.pdf"
}

@Book{ calabria1, date-added = "2020-07-23 08:44:44 +0200", date-modified = "2020-07-23 08:45:15 +0200", Title = "Reggio Calabria Trekking", File = "reggio calabria trekking - a.pdf" }