00304nas a22000977a 4500008004100000022001400041245003600055260009900091300000700190362000900197190206s9999    xx            000 0 und d  a0002-1423  aAgricultural Economics Research  aWashington, D.C.bUS Dept. of Agriculture, Bureau of Agricultural Economicsc1950-53 ; 1964-87  av.  a1949