TY  - BOOK
AU  - Ditan, Carolina Desamero.
TI  - Introduction to biological science
SN  - 971-08-5673-1
AV  - FIL QH 308.2 
CY  - Mandaluyong
KW  - Biology
KW  - Biology -- Problems, exercises, etc
N1  - Includes bibliographical references
ER  -