Telecommunications services for the hearing impaired : hearing before the Subcommittee on Communications of the Committee on Commerce, Science, and Transportation, United States Senate, one hundredth Congress, second session on S.2221 ... June 23, 1988.
United States.Congress.Senate.Committee on Commerce, Science, and Transportation.Subcommittee on Communications.
Washington : USGPO,
1988.
Hearing impaired
Telephone
Telecommunication systems