Humble, Richard       <br/><br/>
U-Boat 
Richard Humble 
 - New York  Franklin Watts  1990 
 - p. 32 
 - Fighting ships . <br/><br/> Includes index 
<br/><br/> A brief history of German submarine warfare during World War II and the measures taken by the Allies to combat the U-boats. 
<br/><br/>  Grade level ‏ : ‎ 3 - 4  
<br/><br/><label>ISBN: </label>531140237 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War Naval operations --Submarine--Juvenile literature--1939-1945 <br/>World War Naval operations, German  --Juvenile literature--1939-1945 <br/>World War Atlantic Ocean --Campaigns--Juvenile literature--1939-1945 
<br/><br/><label>Dewey Class. No.: </label>j940.5451 Hum   29