FAWCETT, H. P., & CUMMINS, K. B. (1970). The teaching of mathematics from counting to calculus. Charles E.Meril.
Lua i Stíl Chicago (17ú heag.)FAWCETT, Harold P., agus Kenneth B. CUMMINS. The Teaching of Mathematics from Counting to Calculus. Columbus: Charles E.Meril, 1970.
Lua MLA (9ú heag.)FAWCETT, Harold P., agus Kenneth B. CUMMINS. The Teaching of Mathematics from Counting to Calculus. Charles E.Meril, 1970.
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