TY  - BOOK
AU  - Bathurst,Effie G.
TI  - How children use arithmetic
T2  - [U. S.] Office of Education. Bulletin, 1951, no. 7. Place of subjects series
AV  - L111 .A6 1951, no. 7
U1  - 372.7 
PY  - 1951///
CY  - [Washington]
PB  - Federal Security Agency, Office of Education
KW  - Arithmetic
KW  - Study and teaching
N1  - Copies 1 and 2 with: Frustration in adolescent youth / David Segel. Washington : Govt. Print. Off., 1951. Bound together subsequent to publication
ER  -