Grossnickle, F. E. (1963). Discovering meanings in elementary school mathematics (4th edition.). Holt, Rinehart and Winston, Inc.
Chicago-viite (17. p.)Grossnickle, Foster E. Discovering Meanings in Elementary School Mathematics. 4th edition. New York: Holt, Rinehart and Winston, Inc, 1963.
MLA-viite (9. p.)Grossnickle, Foster E. Discovering Meanings in Elementary School Mathematics. 4th edition. Holt, Rinehart and Winston, Inc, 1963.
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