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