Bell, Roger T. Sociolinguistics : Goals, approaches, and problems / Roger T. Bell. - London : B. T. Batsford, 1976. - 251 p. : ill. ; 23 cm. Includes indexes. Bibliogr.: p. 229-243. ISBN: 0713432187 0713432195 (pbk.) Subjects--Topical Terms: Sociolinguistics