TY  - BOOK
ED  - Harcourt School
ED  - Publishers.
TI  - Ecosystems and change
T2  - Harcourt School
SN  - 9780153620584 :
PY  - 2009///?]
CY  - Florida
PB  - Harcourt School
KW  - Science
KW  - Juvenile literature
N1  - Includes bibliographical references and index
ER  -