TY  - BOOK
AU  - Gaño, Leticia O.
AU  - Mariano, Teresita R.
AU  - Sacdalan, Marilyn Rose M.
TI  - Environmental science
SN  - 978-9-71047268-0
PY  - 2008///
CY  - Bulacan
PB  - St. Andrew Publishing House
N1  - Includes bibliographical references and glossary
ER  -