TY  - BOOK
AU  - Heddens,James W.
AU  - Speer,William R.
TI  - Today's mathematics: concepts and methods in elementary school mathematics
SN  - 0574231307 (pbk.)
U1  - 372.7 
PY  - 1988///
CY  - Chicago
PB  - Science Research Associates
KW  - Mathematics
ER  -