00588nam a2200157Ia 4500001001100000005001700011008004300028020001500071050001100086245012400097260004600221300002400267650007800291650004600369999001500415000002136420251012174640.0  930702s1977    us            0     eng c  a052121114X 4aHD207510aEconomic development as an adaptive processbthe green revolution in the Indian PunjabcRichard H. Day, Inderjit Singh   aLondonbCambridge University Pressc1977   ax, 326pbillc23cm.00aAgriculturexEconomic aspectszIndiazPunjab (State)xMathematical models00aEconomic developmentxMathematical models  c7999d7999