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- [5] FOURTH COURSE IN MATHEMATICS FOR ELEMENTARY-SCHOOL TEACHERS - ANALYTIC GEOMETRY AMERICAN MATHEMATICAL MONTHLY, 1974, 81 (04): : 399 - 400
- [9] The length of the elementary-school course ELEMENTARY SCHOOL JOURNAL, 1928, 28 (06): : 467 - 470
- [10] WHAT IS STATUS OF ELEMENTARY-SCHOOL MATHEMATICS ELEMENTARY SCHOOL JOURNAL, 1968, 68 (04): : 167 - 171