Harper,W.R. <br/><br/>
Contact and Frictional Electrification 
by W.R. Harper 
 - london  oxford at the clarendon press  1967 
 - xii,369p. 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>537.21  / HAR/C