Chapter 5 sets  Block IV (Chapters 4-6) 

 - Wellington  Open University  1988 
 - 40p.  29cm 
<br/><br/><label>ISBN: </label>0335142745 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical principles
<br/><br/><label>Dewey Class. No.: </label>004.0151  / OPE