TY  - SER
AU  - Hubag, Praxedes
TI  - Fun with outdoor mathematics
U1  - Per. 370.71'051 P552 2004-2007 
PY  - 2006///
CY  - Manila
PB  - Publishers Association of the Philippines, Inc.
KW  - Mathematical skills
KW  - Outdoor mathematics
KW  - Mathematics
KW  - Study and teaching
KW  - Education
ER  -