TY  - BOOK
AU  - Walle J. & Lovin L..
AU  - Lovin L.H
TI  - Teaching student centered  mathematics Vol-I grade k-3.
SN  - 0-205-40843-5
U1  - 372.7 WAL 
PY  - 2006///
CY  - Boston
PB  - Pearson
N1  - includes bibliographical references and index
ER  -