000			00298nam a2200133Ia 4500
001			12069
008			170722s9999 xx 000 0 und d
100			_aRussell, Bertrand
245			_aPrinciples of mathematics /
250			_a2nd ed.
260			_c1956.
653			_aMathematics
942			_cGEN
999			_c53555 _d53555