Hartley, Norman. <br/><br/>
The Viking process / 
by Norman Hartley. 
 - New York :  Simon and Schuster,  c1976. 
 - 285 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0671221981 9780671221980 
<br/><br/><label>LCCN: </label>75033859  
<br/><br/><label>LC Class. No.: </label>PZ4.H3297  PS3558.A697  / Vi 
<br/><br/><label>Dewey Class. No.: </label>365/.64