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Dyfyniad Arddull ChicagoHonsberger, Ross. Ingenuity in Mathematics. Washington, DC: Mathematical Association of America, 1970.
Dyfyniad MLAHonsberger, Ross. Ingenuity in Mathematics. Mathematical Association of America, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.