TY  - BOOK
T1  - More topics in mathematics for elementary school teachers.
LA  - English
PP  - Washington
PB  - [s.n.]
YR  - 1969
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217607675291
OP  - 584
CN  - QA248.3 N3 1969
KW  - Arithmetic : Foundations.
ER  -