TY  - BOOK
TI  - Mathematics for elementary schools ; book 3 / 
U1  - 372.7 MAT 
PY  - 1965///
CY  - Stanford : 
PB  - School mathematics study group , 
N1  -  2 parts;  Part 1. Teacher's Commentary, unit 58. - Part II. Teacher's Commenta ry, unit. 59
ER  -