TY  - BOOK
TI  - Teaching elementary schools mathematics for understanding
U1  - 372.7 M34t 1970 
PY  - 1970///
CY  - New York
PB  - Mc Graw - Hill
UR  - https://sic-library.pilc.org.ph/cgi-bin/koha/opac-retrieve-file.pl?id=33909fed6939087763381af44a61ed62
ER  -