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Dyfyniad Arddull ChicagoGoff, Gerald K., and Milton Edward Berg. Basic Mathematics: A Programmed Introduction. New York: Appleton-Century-Crofts, 1968.
Dyfyniad MLAGoff, Gerald K., and Milton Edward Berg. Basic Mathematics: A Programmed Introduction. Appleton-Century-Crofts, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.