Stage 3: Workbook Packs: Pack 3a  
Stage 3 Workbook Packs Pack 3a 
 -  "24 p. : col.; ill., pbk" 
 - New York  Oxford University Press  1986 
<br/><br/><label>ISBN: </label>9780199160778 
<br/><br/><label>Dewey Class. No.: </label>372.412 ACK  / 2.372.412ACK