=LDR 22 4500 =001 6037 =082 04$a338.1 9 0904 =100 1\$aGrigg, David =245 10$aThe World food problem 1950-1980 =260 \\$aOxford :$bBasil Blackwell =650 \0$aBooks =852 \\$bFreeman Library$h338.1 9 0904