LEFSCHETZ, S. (1949). Introduction to topology. Princeton, Univ. Press.
Chicago Style (17th ed.) ZitazioaLEFSCHETZ, Solomon. Introduction to Topology. New Jersey: Princeton, Univ. Press, 1949.
MLA (9th ed.) ZitazioaLEFSCHETZ, Solomon. Introduction to Topology. Princeton, Univ. Press, 1949.
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