Ledermann, Walter,  1911- <br/><br/>
Complex numbers / 
by Walter Ledermann 
 - London :  English Language Book Society,  1971 
 - 62 p. :  ill. ;  19 cm. 
<br/><br/> First published in 1960 in Great Britain by Routledge 
<br/><br/><label>ISBN: </label>0710086342 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numbers, Complex