00425nam a2200121Ia 4500082002200000100001700022245010100039260004700140300001500187490006600202500000500268700003000273  a338.16330954552b  aSingh, J. P.  aProspects of changing croppings pattern in favour of oilseeds and pulses in Punjab and Haryanab  aDelhibAgro Economic Research Centrec1989  avii, 219p.  aAgricultural Economics Research Centre, research studyv 89/1  a  aAERC, University of Delhi