Title: Secret History of MI6

Author: Jeffery, Keith

Call No: 355.343 JEF

Publisher: Bloomsbury , 38 Square, London, United Kingdom , 2010 Detail

Title: Walls have ears : the greatest intelligence operation of world war II

Author: Fry, Helen

Call No: 940.548641 FRY

Publisher: Yale University Press , New Haven and London, United Kingdom , 2019 Detail