TY  - BOOK
AU  - Enger,Eldon D.
TI  - Environmental science: a study of interrelationships 
U1  - 363.7  Eleventh edition
PY  - 2008///
CY  - Philippines
PB  - McGraw-Hill-Higher Education
KW  - Environmental science
N1  - Includes bibliographical references and index
ER  -