000 00274nam a2200121Ia 4500
999 _c58149
_d58149
020 _a9788120348370
100 _aPanneerselvam R
245 _aEngineering Economics
250 _a2
260 _bPHI learning Private Ltd.
_aNew Delhi
_c2013
300 _axv+348
942 _cBB