Cite
HARVARD Citation
GCHQ, . (2018) The GCHQ Puzzle Book II.. [Online]. London : Michael Joseph. Available from: http://access.bl.uk/ark:/81055/vdc_100068762490.0x000001
This is an interim version of our Electronic Legal Deposit Catalogue-eJournals and eBooks while we continue to recover from a cyber-attack.
GCHQ, . (2018) The GCHQ Puzzle Book II.. [Online]. London : Michael Joseph. Available from: http://access.bl.uk/ark:/81055/vdc_100068762490.0x000001