Pirie, Gordon <br/><br/>
Challenge of orienteering   
by Gordon Pirie 
 - London  Pelham Books  1968 
 - 120p., ill. 
<br/><br/><label>LCCN: </label>7207-0167-8 
<br/><br/><label>Dewey Class. No.: </label>796.5  / N68