Biblioteka
Instytutu
Józefa Piłsudskiego w Ameryce 
Biblioteka
imienia
Alfreda Jurzykowskiego Polskiego Instytutu Naukowego w
Ameryce
Biblioteka Marjanczyków Polskiej Fundacji Kulturalnej 
Kahn, David, 1930-
Seizing the enigma : the race to break the German U-boat codes, 1939-1943 / David Kahn. - Boston : Houghton Mifflin Co., 1991. - xii, 336 p., [16] p. of plates : ill., maps ; 24 cm.
"A Thomas Congdon book"--T.p. verso.
Includes bibliographical references (p. [311]-326) and index.
0395427398 : $24.95
90025128
World War, 1939-1945--Cryptography.
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945 -- Naval operations -- Submarine
D810.C88 / K34 1991
940.54/85
Seizing the enigma : the race to break the German U-boat codes, 1939-1943 / David Kahn. - Boston : Houghton Mifflin Co., 1991. - xii, 336 p., [16] p. of plates : ill., maps ; 24 cm.
"A Thomas Congdon book"--T.p. verso.
Includes bibliographical references (p. [311]-326) and index.
0395427398 : $24.95
90025128
World War, 1939-1945--Cryptography.
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945 -- Naval operations -- Submarine
D810.C88 / K34 1991
940.54/85