000			00305nam a2200121Ia 4500
001			107662
008			170722s9999 xx 000 0 und d
100			_aDavis, Hiram S.
245			_aIndustrial study of economic progress /
260			_c1947.
490			_aIndustrial research studies, 33
942			_cGEN
999			_c36101 _d36101