00415nam a22001697a 4500 NUST - PNEC 20170116181128.0 151006b xxu||||| |||| 00| 0 eng d LIBRARY 621.09 OBR 13787 O'Brien, Robert Machines Robert O'Brien 2nd ed. c1980 13788 Technological innovations ME ddc BK 69831 69831 0 0 ddc 0 0 PNEC PNEC WING-A 0000-00-00 0 621.09 OBR PNECLIB-016016 2015-10-06 0000-00-00 BK