Gannon, Michael <br/><br/>
Operation Drumbeat :  the dramatic true story of Germany's first U-boat attacks along the American coast in World War II 

 - 1st ed. 
 - New York  Harper & Row  1990 
 - xxii, 490 p. 
<br/><br/><label>ISBN: </label>0060161558 
<br/><br/><label>Dewey Class. No.: </label>940.542  / GAN