TY  - BOOK
AU  - Turing, Dermot
TI  - X, Y et Z :  the real story of how Enigma was broken 
SN  - 978 0 7509 8782 0
U1  - 940 548641 TUR 
PY  - 2018///
CY  - Gloustershire [England] 
PB  -  The History Press
KW  - GREAT BRITAIN GOVERNMENT CODE AND CYPHER SCHOOL
ER  -