Lewin, Ronald. <br/><br/>
The American magic :  codes, ciphers, and the defeat of Japan / 
Ronald Lewin. 
 - New York :  Farrar Straus Giroux,  c1982. 
 - xv, 332 p., [16] p. of plates :  illustrations, maps ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 309-311. 
<br/><br/><label>ISBN: </label>0374104174 (jacket) :  $13.95 
<br/><br/><label>LCCN: </label>81015099  
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War, 1939-1945--Cryptography.<br/>World War, 1939-1945--Secret service--United States.<br/>World War, 1939-1945--Pacific Ocean.<br/>World War, 1939-1945--Japan.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Japan--History--1912-1945.
<br/><br/><label>LC Class. No.: </label>D 810  / .C88L48