TY  - BOOK
AU  - Astorga, Ma. Joanna A.
TI  - Physical science
SN  - 978-971-0183-12-8
U1  - 500.2 P578 2012 
CY  - Manila
PB  - Grandbooks Pub.
KW  - Physical science
KW  - Science
N1  - Includes Biblio ref
ER  -