00357nam a22001097a 4500008004100000100002300041245007300064250001000137264003300147653003500180653003200215240523s1978    us ||||| |||| 00| 0 eng d  aSteen, Lynn Arthur  aCounterexamples in topology /cLynn Arthur Steen, J. Arthur Seebach.  a2. ed  aNew York :bSpringer,c1978.  aმათემატიკა  aტოპოლოგია