000			00312nam a2200145Ia 4500
008			220926s9999 xx 000 0 und d
100			_aB.D.Gupta
245		0	_aTopology
250			_a1st Ed
260			_aMeerut
260			_bKetharnath Ramnath Publishers
260			_c1971
650			_aTopology
942			_cBK
999			_c418 _d418