TY  - BOOK
AU  - Aldrich, Richard J.
TI  - GCHQ: the uncensored story of Britain's most secret intelligence agency 
SN  - 9780008351809
AV  - UB251 .G7 A365 2019
PY  - 2019///
CY  - London
PB  - William Collins, an imprint of Harper Collins Publishers
KW  - Government Code and Cypher School (Great Britain)
KW  - History
KW  - Great Britain
KW  - Government Communications Headquarters (1948- )
KW  - Espionage, British
N1  - Previous edition: 2010; Includes bibliographical references (pages 650-669) and index
ER  -