000 00324nam a2200121Ia 4500
008 151018s9999 xx 000 0 und d
080 _aF631.371
_bACO-P
100 _aAcock, A. M.
245 _aProgress and economic problems in - farm mechanization
260 _c1950
_aWashington
300 _avii 87p.
942 _cFAO
_2udc
999 _c25830
_d25830