00499cam a22001337a 4500008004000000082001200040245009900052260004900151300001000200440007700210650002800287650001400315700003600329180718b1990   xxu||||| |||| 00| 0 eng d  aO91 S29  aStatus and trend of water quality of river Ganga 1983-1989cby Central Pollution Control Board  aDelhibCentral Pollution Control Boardc1990  a227p.  aMonitoring of Indian national aquatic resources series: minars/6/1990-91  aWater pollution - India  aPollution  aCentral Pollution Control Board