00333nam a22001217a 45000050016000000200023000160350012000390370013000511000030000642450065000942600033001593000019001922012031207457.0  a817525037Xc400.00  aB-17969  aDPLbENG  aBarthakur, Jitendra Kumar  aPresent understanding of time /cby Jitendra Kumar Barthakur  aNew DelhibKumud Booksc1999  a350p.c18 cms.