'900' numbers.

Bibliographic Details
Corporate Author:	United States. Federal Trade Commission. Office of Consumer and Business Education
Format:	Government Document Book
Language:	English
Published:	Washington, D.C. : Office of Consumer/Business Education, Bureau of Consumer Protection, Federal Trade Commission, 1990.
Series:	Facts for consumers from the Federal Trade Commission.
Subjects:	Dial-a-message telephone calls > United States. Consumer protection > United States.

Evans: US Documents (Annex 5th floor)