00374nam a2200121Ia 450000500170000000800410001702000180005808200150007610000180009124500850010926000430019465000150023720240911061922.0211102s9999    xx            000 0 und d  a9788120346000  a363.7bGUP  aGupta, R. C.  0aEnergy and environmental management in metallurgical industries /cGupta, R. C.   aNew DelhibPHI learning pvt. Ltdc2012  aManagement