Griffin, Gwyn. <br/><br/>
An operational necessity / 
Gwyn Griffin. 
 - New York :  Putnam,  1967. 
 - 477 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War, 1939-1945--Naval operations--Submarine--Fiction.<br/>Submarines (Ships)--Fiction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>War stories.<br/>Sea stories.
<br/><br/><label>Dewey Class. No.: </label>823.91  / GRO 1967