TY - BOOK AU - Burton,Grace M. ED - National Council of Teachers of Mathematics TI - Third-grade book T2 - Curriculum and evaluation standards for school mathematics addenda seriesGrades K-6 SN - 0873533135 U1 - 372.7 23 PY - 1992///. CY - Reston: PB - National Council of Teachers of Mathematics, KW - Mathematics KW - Study and teaching (Elementary) ER -