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English grammer/B.A. Phythian, Gordon Humphreys
London Hodder & Stoughton 1992,
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Greenbaum, Sidney
An introduction to English grammar/Sidney Greenbaum
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Gramley, Stephan
A survey of modern English
Routledge , 1992
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Close, R.A.
English we use anthology of current usage with exercises for practice in the spoken and written language / Close R.A.
Longmans , 1967
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Longman dictionary of contemporary English
Longman, 1989
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