Kernel one (-three) / 
Robert O'Neill . 
 - Harlow :  Longman,  1978 . 
 -  practice pictures + sound cassettes . 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers
<br/><br/><label>LC Class. No.: </label>PE1128 
<br/><br/><label>Dewey Class. No.: </label>428.24