✓

@Book{            LangfordBilissi,
  Author        = "Langford, Michael and Bilissi, Efthimia",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:27 +0200",
  Keywords      = "photography",
  Publisher     = "Focal Press",
  Title         = "Langford's Advanced Photography - The Guide for Aspiring Photographers",
  Year          = "2011",
  File          = "Langford's Advanced Photography - The Guide for Aspiring Photographers - Langford, Bilissi (0) (0) - a - a.pdf"
}

@Book{ LangfordBilissi, Author = "Langford, Michael and Bilissi, Efthimia", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:27 +0200", Keywords = "photography", Publisher = "Focal Press", Title = "Langford's Advanced Photography - The Guide for Aspiring Photographers", Year = "2011", File = "Langford's Advanced Photography - The Guide for Aspiring Photographers - Langford, Bilissi (0) (0) - a - a.pdf" }