. . "1900 - 1999" . . . . "Mafia monograph"@en . . . . . . . "[FBI documents regarding the Mafia Monograph]"@en . . . . . . . . . . . "The Mafia Monograph was written by the FBI in 1958 as a study of the origin, nature, and activities of the Mafia in its native Sicily and how it was transplanted to the United States."@en . . . . "Mafia Monograph"@en . . . "Archives"@en . . . . . "Mafia Monograph." . . "United States." . .