Lieberson, Stanley, Language diversity and language contact : essays / Stanley Lieberson ; selected and introduced by Anwar S. Dil. - Stanford, Calif. : Stanford University Press, c1981. - xiv, 390 p. : ill. ; 23 cm. Includes bibliographies. ISBN: 0804710988 Subjects--Topical Terms: Sociolinguistics.Areal linguistics. Dewey Class. No.: 401.9 / LIL 1981