Cite
MLA Citation
Chris Christensen. “Review of The Triumph of Zygalski's Sheets: The Polish Enigma in the Early 1940 by Zdzisław J. Kapera.” Cryptologia, vol. 41, no. 3, 2017, pp. 283–285. http://access.bl.uk/ark:/81055/vdc_100045925613.0x000061