00337nam a2200109Ia 4500008004100000040003800041100001800079245005300097260004500150300001600195653001600211211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aNewman, M H A 0aElements of the topology of plane sets of points  bAT THE UNIVERSITY PRESSaCAMBRIDGEc1954  aVI,214 P p.  aMATHEMATICS