TY  - BOOK
AU  - Heddens, James W.
AU  - Speer, William R.
TI  - Today's Mathematics: concepts and methods in elementary school mathematics
SN  - 0023529334
AV  - QA 135.5 .H42 1992 
PY  - 1992///
CY  - New York
PB  - Macmillan Publishing Company
KW  - Mathematics
KW  - Study and teaching (Elementary)
N1  - Includes bibliographical references and index
ER  -