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008			200615s9999||||xx |||||||||||||| ||und||
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082			_a4 _bWIL-C
100			_aWILLIAM STALLINGS
245		0	_aCRYPTOGRAPHY AND NETWORK SECURITY
250			_a7TH
260			_anew delhi _bPEARSON _c2017
300			_a120
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