OK 4 : workbook /
David Bolton, Clive Oxenden, Len Peterson
- Oxford, U.K. : Oxford University Press, 1990
- 46 p. ; 28 cm.
- Oxford intensive English courses .
Accompanied by : Set of 2 sound cassettes : Cassette 1 (45 min.) : Unit 1-6 - Cassette 2 (45min) : Unit 7- 12. ISBN 0194323684
0194323668
English language--Grammar--Problems, exercises, etc. English language--Textbooks for foreign speakers--Problems, exercises, etc.