Baum, John D. Elements of point set topology / John D. Baum. - Prentice-Hall, [c1964]. - x, 150 p. : diagrs. ; 24 cm. Bibliography : p. 145-146. LCCN: 64013253 Subjects--Topical Terms: Topology. Subjects--Index Terms: მათემატიკა ტოპოლოგია LC Class. No.: QA611 / .B29 Dewey Class. No.: 513.83 Universal Decimal Class. No.: 515.1