Complex numbers. 

 - London :  The Open University,  1971. 
 - viii,48p.  :ill.  29cm. 
 -  Vol.1 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numbers<br/>Complex
<br/><br/><label>LC Class. No.: </label>QTO QA255.O2