TY  - BOOK
AU  - Green,George F.
TI  - Elementary school mathematics: activities and materials
SN  - 0669845825
AV  - QA135.5 .G675
U1  - 372.7 
PY  - 1974///]
CY  - Lexington, Mass.
PB  - Heath
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Local
N1  - Includes bibliographies and index
ER  -