: You can borrow a digital copy or view the full PDF of An Introduction to General Topology .
As a legacy academic text, "An Introduction to General Topology" by Paul E. Long is widely available through digital preservation libraries: an introduction to general topology paul e long pdf link
: A secondary listing and lending service for the same archive can be found at Open Library . : You can borrow a digital copy or
: Analysis of these two pivotal properties that describe the "global" shape and finiteness of spaces. an introduction to general topology paul e long pdf link