00323pam a2200133 a 4500020000500000041000800005082001300013100001700026245004400043250001000087260003800097300001000135653004400145  c  aeng  a600bSIN  aASHOK SINGH.  aScience & TechnologyhTextual Documents  a2010.  aNew DelhibTata McGraw Hillc2010  a646P.  aTechnology, Civil Service, MPSC, UPSC,