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1
Language in use : pre-intermediate classroom book / Adrian Doff, Christopher Jones.
Cambridge, U.K. : Cambridge University Press, 2000
128 p. : col. ill., maps ; 30 cm.
2
Language in use : a pre-intermediate course : teacher s book / Adrian Doff; Christopher Jones.
Cambridge : Cambridge University Press, cop., 1991
144 p. : ill. en coul. ; 30 cm.

This is part of a course specifically designed for pre-intermediate learners, allowing those who come from a broad range of previous learning situations to enter at this level and make progress, without presupposing knowledge from another coursebook.
3
Language in use : Intermediate : Teacher s book / Adrian Doff; Christopher Jones.
Cambridge : Cambridge University Press, 1995.
143 p. : il. ; 30 cm.
4
Language in use : upper-intermediate classroom book / Adrian Doff, Christopher Jones
Cambridge : Cambridge University Press, 1997
128 p. ; 30 cm.
5
Language in use : Upper-intermediate Classroom book / Adrian Doff, Christopher Jones.
Cambridge : Cambridge University Press, 1998.
128 tr. : ill. ; 30 cm.