Johnston, C. L. <br/><br/>
Essential arithmetic   
by C. L. Johnston, Alden T. Willis and Jeanne Lazaris 
 - 5th ed. 
 - Belmont, California  Wadsworth Pub.  1988 
 - xii, 628p. 
 - Johnston/Willis Developmental Mathematics Series .
<br/><br/><label>ISBN: </label>0534090788 
<br/><br/><label>Dewey Class. No.: </label>513.142  / N88