Kozaczuk, Władysław  (1923-2003). <br/><br/>
Enigma :  how the German machine cipher was broken, and how it was read by the Allies in World War Two / 
Tyt. oryg.:  W kręgu Enigmy. 
Wladyslaw Kozaczuk ; ed. and transl. by Christopher Kasparek. 
 - [Frederick] :  Univ. Publications of America,  cop. 1984. 
 - XIV, 348 s., [32] s. tabl. :  rys. ;  24 cm. 
 - Foreign Intelligence Book Series. .
<br/><br/>Bibliogr. s. 321-328. - Indeks. 
<br/><br/><label>ISBN: </label>0890935475 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enigma (maszyna szyfrująca)<br/>Wojna 1939-1945 r.<br/>Wywiad niemiecki--1933-1945 r.<br/>Wywiad polski--1939-1945 r.
<br/><br/><label>Subjects--Index Terms: </label>Machine ciphers.