Plessis, Nicolaas Du. <br/><br/>
Introduction to potential theory   
by Nicolaas Du Plessis 
 - Edinburgh  Oliver & Boyd  1970 
 - viii, 177p. 
 - University Mathematical Monographs .
<br/><br/><label>ISBN: </label>0 05 002054 4 
<br/><br/><label>Dewey Class. No.: </label>515.35  / N709