. . . . . . . . . "Electronic books"@en . . . "Fiction" . "Fiction"@en . . . "Alice au bal masque" . "Detective and mystery stories"@en . . . . . . . . . "The clue of the velvet mask" . . "The clue of the velvet mask"@en . . . . . . . . "La maschera di velluto"@it . . "La maschera di velluto" . "The Clue of the Velvet Mask (Nancy Drew #30)"@en . . . . . . . . . . . . . . "Alice au bal masqué : [the Clue of the velvet mask]. Texte français d'Hélène Commin. Illustrations d'Albert Chazelle" . . . . "When a gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, the teen-age detective switches identity with her girl friend to solve the case."@en . . "When a gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, the teen-age detective switches identity with her girl friend to solve the case." . . . . . . "Clue of the velvet mask"@it . "Alice au bal masqué : [\"the Clue of the velvet mask\"]. Texte français d'Hélène Commin. Illustrations d'Albert Chazelle" . . "Roman policier" . . . "Kitty och den maskerade mannen"@sv . . . . "Nancy switches identity with her girl friend, when a gang that uses parties as a cover for robberies, victimizes a masquerade party she is attending."@en . . . . . "Mystery stories"@en . . . . . . . . "Mystery fiction" . . . . . . . . . . . . . . . . "The Clue of the Velvet Mask"@en . "The CLUE OF THE VELVET MASK" . . . . . . . . . . "The Clue of the Velvet Mask #30"@en . . "Alice au bal masqué" . "Juvenile works"@en . "The clue of the velvet mask : Nancy Drew mystery stories"@en . . . . . "Juvenile works" . . . . . . . "Literatura juvenil." . . "Drew, Nancy (Fictitious character) Fiction." . . "Mystery fiction Children's literature." . . "Accelerated Reader." . . "Keene, Carolyn." . . . "Mondadori," . . "Drew, Nancy (Fictitious character) Juvenile fiction." . . "Mystery and detective stories." . . "Mystery Junior Fiction." . . "Roman." . . "Grosset & Dunlap." . . "Nancy Drew Mystery Stories." . . "Mystery fiction." . .