TY  - BOOK
AU  - Hirschi,L.Edwin
TI  - Building mathematics concepts in grades kindergarten through eight
T2  - The International series in elementary education
SN  - 0700221964
AV  - QA135.5 .H57
U1  - 372.7 
PY  - 1970///]
CY  - Scranton, Pa.
PB  - International Textbook Co.
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Local
ER  -