TY  - BOOK
AU  - Espina, Adela 
TI  - Exploring science and technology I : integrated science
SN  - 978-971-48-0848-5
U1  - Fil. 500 Es77 2008 
PY  - 2008///
CY  - Makati City
PB  -  Diwa Learning Systems, 
KW  - Science. - Study and teaching (Secondary) - Philippines
ER  -