00302nam a2200109Ia 450000500170000000800410001708200150005810000240007324500420009726000450013930000080018420260224040809.0260224s9999||||xx |||||||||||||| ||und||  a338.13 SHE  aGeoffrey S.Shepherd 0aAgricultural price and income policy.  aAmes: The IOWA State College Pressc1947  a288