Kozaczuk, Władysław. <br/><br/>
W kre̜gu Enigmy / 
Władysław Kozaczuk. 
 - Wyd. 2. 
 - Warszawa :  "Ksia̜żka i Wiedza",  1986. 
 - 443 p. :  ill., facsims., ports. ;  20 cm. 
<br/><br/>Includes bibliographical references (p. 431-[436]) and index. 
<br/><br/><label>ISBN: </label>8505112543 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enigma cipher system.<br/>Machine ciphers.<br/>World War, 1939-1945--Cryptography.<br/>World War, 1939-1945--Military intelligence.
<br/><br/><label>LC Class. No.: </label>D810.C88  / K69 1986