Jessel, Levic The ethnic process : an evolutionary concept of languages and peoples / Levic Jessel - The Hague : Mouton Publishers, 1978 - 271 p. ; 24 cm. - Contributions to the sociology of language ; 20 . - Contributions to the sociology of language ; 20 . Includes bibliographical references and index ISBN: 9027976031 Subjects--Topical Terms: Anthropological linguisticsSociolinguistics