00521nam a22001577a 450000500170000001000150001702000260003203500140005803700130007208200110008510000240009624501040012026000420022427000720026630000250033820181008143240.0  aENG-124211  c225.00a9788193840320  aEN-107743  bDBAD/PUB  a301.01  aHaldar, Ashok Kumar  aThe radical change of human society and with it's scientific observation / /cby Ashok Kumar Haldar  aWest Bengalc2017bAshok Kumar Haldar  bWest BengalaBidhanpally, P.O. Jhaljhalia, District  Malda,e732102  a120p.c21(Hb.)bill.