000			00305nam a2200133Ia 4500
001			11035
008			170722s9999 xx 000 0 und d
245			_aScience and civilization /
260			_c1923.
490			_aUnity series;6
653			_aScience
700			_aMarvin, F. S. _eeditor.
942			_cGEN
999			_c28203 _d28203