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082 _a621.393 N178E
100 _aNagrajan N S
245 0 _aElements of electronic navigation
_cNagrajan N S
250 _a2nd
260 _aNew Delhi
_bTMH
_c1996
300 _ax175
650 _aElements of electronic navigation
_943598
942 _cBK
999 _c1517
_d1517