=LDR            22        4500
=001  105
=082  04$a630 .9
=100  1\$aGrigg, David
=245  10$aThe agricultural systems of the world
=260  \\$aLondon :$bCambridge University Press,$c1974
=650  \0$aBooks
=852  \\$bFreeman Library$h630 .9