00405nam a2200157Ia 4500008004100000082001600041100001800057245003900075260003400114300000800148650001400156650002000170653001600190653002100206700002000227170901s1950    xx            000 0 und d  a338.1bF68E  aFoster, G. W. 0aElements of Agricultural Economics  aNew YorkbPrentice-Hallc1950  a441  aEconomics  aSocial sciences  aAgriculture  aEconomic aspects  aLeager, Marc C.