The keytext program activity book : lasttrain 
Louise Matteoni ...[et.el.]. 
 -  The economy company.  1984 
 - 128 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-8332-3167-7 
<br/><br/><label>Dewey Class. No.: </label>425 M41c 1984