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Keene, Carolyn.

The clue of the velvet mask. - New York Grosset & Dunlap [1953] - 211 p. - Her Nancy Drew mystery stories, 30 .

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.

LCCN: 69014266 /AC/r84

Subjects--Topical Terms:
Mystery and detective stories.

LC Class. No.: PZ7.K23 / Nan, no. 30 1953

Dewey Class. No.: [Fic]