The open university  <br/><br/>
Introduction   Groups and subgroups  
by the open university  
 - Britian   The open university   1980 
 - 59p, :ills,  Pbk 
<br/><br/><label>ISBN: </label>0335057942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Introduction to pure mathematics 
<br/><br/><label>LC Class. No.: </label>QA36.5.0611980