Cite
APA Citation
Singh, S. (2011). The code book : the secret history of codes and codebreaking. London : Fourth Estate. http://access.bl.uk/ark:/81055/vdc_100064285049.0x000001
This is an interim version of our Electronic Legal Deposit Catalogue-eJournals and eBooks while we continue to recover from a cyber-attack.
Singh, S. (2011). The code book : the secret history of codes and codebreaking. London : Fourth Estate. http://access.bl.uk/ark:/81055/vdc_100064285049.0x000001