Obee, Bob <br/><br/>
Upstream /  Upper intermediate / 
Bob Obee, Virginia Evans. 
 - 5 v. :  ill. ;  28-30 cm. 
<br/><br/><label>ISBN: </label>1843255308 (Student's book) 1843255324 (Workbook) 1845581962 (Workbook key) 1843255316 (Teacher's book) 1844661024 (Test booklet) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Study and teaching (Secondary)--Foreign speakers<br/>English language--Textbooks for foreign speakers--Textbooks for foreign speakers