00554     2200205   4500001002100000005001500021035002000036245004600056100002000102250000600122300003600128260004800164082001000212084001600222020000600238650001700244008004100261990002300302990002300325INLIS00000000000497120240724093929  a0010-02230000251 aAn Introduction to Agricultural Economics0 aROSS, Robert C.  a-  avii, 414 hlm. :bilus. ;c21 cm  aNew York :bMcGraw-Hill Book Company,c1951  a338.1  a338.1 Ros a  a- 4aAgricultural240724                           0 ind    ac.2(1125/SPP/Pb/-)  ac.1(1124/SPP/ha/-)