Complex numbers:  Unit guide, the school mathematics project/ 
Stan Dolan, Ron Haydock, Barrie Hunt, et...al.(main authors) 
 - Cambridge,  Cambridge University Press;  1991. 
 - 64p.:  ill. and diagrams;  24 cm+ 
<br/><br/><label>ISBN: </label>0521426634 9780521426633 
<br/><br/><label>LC Class. No.: </label>QA107  / .C73 1991