176339 Croom, F. H. (1989). Principles of topology. Philadelphia : Saunders College.
Chicago-čujuhus (17. p.)176339 Croom, Fred H. Principles of Topology. Philadelphia : Saunders College, 1989.
MLA-čujuhus (9. p.)176339 Croom, Fred H. Principles of Topology. Philadelphia : Saunders College, 1989.
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