00281nam a2200121Ia 4500082001700000100002000017245002500037260003500062300001400097490003800111500000500149700000500154  a514bG111.PS  aGaal, Steven A.  aPoint set topologyb  aNew YorkbAcademic Pressc1964  axi, 317p.  aPure and Applied Mathematicsv 16  a  a