٣٢ - Firth, J. R.: Word-Palatograms And Articulation
Bulletin of the School of Oriental And African Studies, (University of London) XII, ٣ - ٤, ١٩٤٩.
٣٣ - Firth, J. R.:
Improved Techniques in Palatography.
Bulletin of the School of Oriental & African Studies, XIII, ٣,١٩٥٦.
٣٤ - Firth, J. R.:
Personality And Language In Society.
The Sociological Review (Journal of the Institute of Sociology, Ledbury, Hereforshire, England) Vol XLII, Section Two, ١٩٥.
٣٥ - General Linguistics And Descriptive Grammar. Transactions of The Philogical Society of Great Britain, ١٩٥١. (Republished In. Firth, J. R.: Papers In Linguistics, pp. ٢١٦ - ٢٢٨) .
٣٦ - Firth, J. R.:
Transactions of The Philogical Society of Great Britain pp. ٨٣ - ١٠٣, ١٩٥٥.
٣٧ - Firth, J. R.:
(Professor Emeritus of General Linguistics, University of London) .
Papers In Linguistics ١٩٣٤ - ١٩٥١.
London, Oxford University Press, New York, Toronto, ١٩٥٧.
٣٨ - Fries, Charles C.:
The Structure Of English An: Introduction To The Study Of English
Sentences. New York, Hacourt, Brace, ١٩٥٢.
٣٩ - Gairdner, W. H. T.:
The Phonetics of Arabic. A Phonetic Inquiry And Practical Manual For The Pronunciation of Classical Arabic And of One Colloquial (The Egyption)
London,١٩٢٥.
٤٠ - Gardiner, A H:
The Theory of Speech and Language. Oxford, Clarendon Press, ١٩٣٢.