000			00656nam a2200217Ia 4500
008			160601s9999 xx 000 0 und d
100			_aHaroldsen, Edwin O _927130
100			_aHeady, Earl O _92540
100			_aMayer, Leo V _927131
100			_aTweeten, Luther G _927132
245			_aRoots of the farm problem
245			_bchanging technology, changing capital use, changing labour needs
260			_aAmes
260			_bThe Iowa state university press
260			_c1965
300			_aviii, 224p.; 22cm.
650			_aCommodity supply _927133
650			_aFarm problem _927134
650			_aFarming _93374
650			_aHired farm labour _927135
999			_c8998 _d8998