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Passport to IELTS / Diana Hopkins, Mark Nettle.
New York : Prential hall, 2003
164 p. : ill. ; 28 cm.



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Teaching by principles : an interactive approach to language pedagogy / H. Douglas Brown
Englewood Cliffs, N.J. : Prentice Hall Regents, 1994
xii, 467 p. : ill. ; 24 cm.