Bob Obee
Books
Cambridge first certificate grammar and usage
1995
ISBN 9780521435390
The grammar activity book
1999
ISBN 9780521575799
Mission IELTS 1 Academic
2010
ISBN 9781849746625
Mission IELTS
2010
ISBN 9781849746656- No cover
Upstream. Upper-intermediate. B2. Student's book. Per le Scuole superiori
2008
ISBN 9781848620827