TY  - BOOK
AU  - San Pedro, Rizalina P.
AU  - Enriquez, Alice F.
TI  - Science : : physical concepts 
AV  - Q181  .Sa58 1976
PY  - 1976///
CY  - Manila : 
PB  - Philippine Book
KW  - Science
KW  - Science --
KW  - Study and teaching
N1  - Bibliography : p. 289-290 Includes index
ER  -