I have photocopied pages of a advanced-looking point-set topology textbook, but I don't know the name of the book or the author. It has 427 pages (the last index page is p.427), and based on its references, it was written no earlier than 1966, and probably no later than 1975. I've attached a picture of two of its pages. Can someone identify it for me? I want to get the full book, but I can't remember where I got the photocopied pages from. The topics are point-set topology, and it has many advanced definitions and theorems not found in introductory topology textbooks.