Sibawayh the phonologist. A critical study of the phonetic and phonological theory of Sibawayh as presented in his treatise Al-Kitab. By A. A. Al-Nassir. (Library of Arabic Linguistics, Monograph No. 10.) pp. xx, 130 + pp. 12 (Arabic). London and New York, Kegan Paul International, 1993. £55.00.