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Review/Citation:  PORUBSKÝ, Štefan. STP Cipher of the Czechoslovak In-Exile Ministry of Defence in London during WWII. In: GATHEN, J., GROŠEK, O., NEMOGA, K., WACKER, A., eds. Proceedings of the 3rd European Historical Ciphers Colloquium Euro HCC 2017. Bratislava: Slovak University of Technology, 2017, s. 47-66. ISBN 978-80-227-4687-8.
Requested document:  a0474726.pdf - Publisher’s postprint
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