TY  - BOOK
TI  - Adding whole numbers: level one: book 2 breaktrough math 
SN  - 0-88336-811-0
AV  - TR(GS 510.7 Ad21 1981
PY  - 1978///
CY  - Syracuse, NY
PB  - New Readers Press
KW  - Mathematics - - study and teachings
KW  - addition
ER  -