TY  - BOOK
AU  - DUTTON, Wilbur H
TI  - Evaluating pupil's understanding of arithemetic
U1  - 372.72 D97E 
PY  - 1964///
PB  - Englewood Cliffs, U.S.
KW  - EDUCATION, ELEMENTARY
KW  - MATHEMATICS -- STUDY AND TEACHING (ELEMENT
ER  -