00281nam a2200097Ia 4500008004100000082001700041100001900058245004400077260004200121300002000163260320b        |||||||| |||| 00| 0 eng d  a514bW187.GI  aWall, C. T. C.  aA geometric introduction to topologyb/  aMassachusetts:bAddison-Wesley,c1972  avi, 168p. Index