000			00333nam a2200133Ia 4500
001			14873
008			170722s9999 xx 000 0 und d
100			_aBlackett Donald W.
245			_aElementary topology : _bA combinational and algebraic approach /
260			_c1967
653			_aMathematics
653			_aTopology
942			_cGEN
999			_c3180 _d3180