00310pab a2200121 454500008004000000100002100040245005500061260000900116300001000125362000800135650001600143773002900159180718b1983   xxu||||| |||| 00| 0 eng d  aSchuh, G. Edward  aChanging trands in world food production and trade  c1983  a235-8  aMay  aFood Supply  aAmerican Economic Review