Ryser, H. J. (1963). Combinatorial mathematics. Mathematical Association of America, distributed by Wiley.
Lua i Stíl Chicago (17ú heag.)Ryser, Herbert John. Combinatorial Mathematics. Buffalo: Mathematical Association of America, distributed by Wiley, 1963.
Lua MLA (9ú heag.)Ryser, Herbert John. Combinatorial Mathematics. Mathematical Association of America, distributed by Wiley, 1963.
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