Welsh,Dominic. (1988). Codes and cryptography. Oxford University Press.
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Dyfyniad Arddull Chicago
Welsh,Dominic. Codes and Cryptography. New York: Oxford University Press, 1988.
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Dyfyniad MLA
Welsh,Dominic. Codes and Cryptography. Oxford University Press, 1988.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.