Book Reviews: The Multilingual Community: Bilingualism. A special issue of the European Journal of Cognitive Psychology. Edited by A.M.B. de Groot & C. Barry. (Hillsdale,N.J.: Erlbaum,1992). Hardback,$33.50. ISBN 0-86377-906-9

Krashen, S.D. & Terrell, T.D. (1984). The Natural Approach: Language Acquisition in the Classroom (San Francisco: Pergamon Press).

Lenneberg, E.H. (1967). Biological Foundations of Language ( New York: Wiley).

Oyama, S. ( 1979): The concept of the sensitive period in developmental studies Merill-Palmer Quarterly, 25, 83-103.

Weinreich, U. (1968). Languages in Contact (The Hague : Mouton). (First edition 1953. New York: Linguistic Circle of New York Publication No. 2.)