TY  - BOOK
AU  - Balsicas, Nilda W.
TI  - A worktext in natural science : : biological science 
SN  - 9716856520
U1  - 574 B196 2005 revise edition
PY  - 2005///
CY  - Quezon City
PB  -  Lorimas Pub.
N1  - Includes bibliographical references
ER  -