Blackett, D. W. (1967). Elementary topology: A combinatorial and algebraic approach. New York: Academic Press.
Παραπομπή Chicago StyleBlackett, Donald W. Elementary Topology: A Combinatorial and Algebraic Approach. New York: Academic Press, 1967.
Παραπομπή MLABlackett, Donald W. Elementary Topology: A Combinatorial and Algebraic Approach. New York: Academic Press, 1967.
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