Wajnryb , Ruth <br/><br/>
Classroom observation tasks: a resource book for language teacher and trainers. 

 - New York  Cambridge University Press  1992 
 - viii , 145 p. ; 24 cm. 
<br/><br/><label>ISBN: </label>0521403626 
<br/><br/><label>Dewey Class. No.: </label>418.007  WAJ