00262nam a2200109 a 450000500170000002000150001708200190003210000210005124500410007226000240011330000150013720251203091516.0  a0895737701  a542.8,bD, rog  aRogers, Donald W  aComputational chemistry using the PC  aNew YorkbVCHc1990  a224p, 22cm