TY  - BOOK
AU  -  Hartung,Maurice Leslie
TI  -  Seeing through arithmetic
U1  -  511 HAR 
PY  - 1960///
CY  -  Chicago : 
PB  -  Scott, Foresman, 
KW  -  Arithmetic
KW  -  Study and teaching (Elementary)
N1  -  Special book A
ER  -