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Codes and ciphers.

APA Citation

D'Agapeyeff, A. (Alexander). (1971). Codes and ciphers. Ann Arbor, Mich.: Gryphon Books.

MLA Citation

D'Agapeyeff, A. (Alexander). Codes And Ciphers. Ann Arbor, Mich.: Gryphon Books, 1971.

Warning: These citations may not always be complete (especially for serials).