Burger, W. <br/><br/>
Radar Observer's Handbook for Merchant Navy Officers 

 - 6th ed. 
 -  Brown, Son and Ferguson, Ltd.  1978 
 - viii, 350 
<br/><br/><label>ISBN: </label>0851743145, 
<br/><br/><label>Dewey Class. No.: </label>Column-42