00289nam a2200109Ia 450000500170000000800410001708200140005810000190007224500430009126000370013430000080017120260224041002.0260224s9999||||xx |||||||||||||| ||und||  a338.1 SCH  aSchultz, T.W.  0aProduction and welfare of agriculture.  aNew York: Macmillan & Co. c1949  a225