000			00301nam a2200133Ia 4500
001			11513
008			170722s9999 xx 000 0 und d
100			_aBeveridge W. I. B.
245			_aArt of scientific investigation /
260			_c1950
653			_aResearch
653			_aScience
942			_cGEN
999			_c19643 _d19643