TY  - BOOK
AU  - Heddens, James W.
TI  - Today's mathematics : : concepts and methods in elementary school mathematics 
SN  - 0574230955
U1  - 510.7 HED 
PY  - 1925///
CY  - United States
PB  - Library of Congress Cataloging
KW  - Mathematics
KW  - Study and teaching (Elementary)
N1  - Includes index
ER  -