00270nam a22001097a 4500003000400000008004100004082001700045100001600062245004700078260002700125300000800152OSt240712b        |||||||| |||| 00| 0 eng d  a632.58bG96W  aGupta ,O.P.  aWeed Management : Principles and practices  aAgro Bot,Bikanerc1993  a270