Johnston, Bernard L <br/><br/>
Numbers and symmetry  an introduction to algebra 

 - Boca Raton  CRC Press  1997 
 - 260p.  23 cm. 
<br/><br/><label>ISBN: </label>084930301X 
<br/><br/><label>Dewey Class. No.: </label>512.02  / JOH