TY  - BOOK
AU  -  Mold,Josephine
TI  -  Number lines / 
SN  -  0521200237
U1  -  513 MOL 
PY  - 1973///
CY  -  Cambridge : 
PB  -  Cambridge University Press, 
KW  -  Number line
KW  -  Juvenile literature
KW  -  Number concept
ER  -