Oehlers, K. <br/><br/>
O-level English language practice exercises / 
K. Oehlers. 
 - Revised ed. 
 - Singapore :  Canon International  1981. 
 - viii, 172 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>9971830892 (pbk.) 9789971830892 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Problems, exercises, etc.<br/>English language--Study and teaching--Foreign speakers.