00482pab a2200157 454500008004000000100001700040245008100057260000900138300001400147362001200161650004500173650002800218700001700246700001600263773004500279180718b2004   xxu||||| |||| 00| 0 eng d  aSingh, Karam  aWheat production and sustainability in Punjab: growth and varietal diversity  c2004  ap.745-71.  aOct-Dec  aAgricultural production - India - Punjab  aAgricultural production  aKalra, Sajla  aRangi, P.S.  aIndian Journal of Agricultural Economics