TY  - BOOK
AU  - Beatty, Richard.
TI  - Rivers and Lakes
SN  - 9628882759
AV  - 912 
CY  - Singapore : 
KW  - Lake ecology --
KW  - Lake ecology
KW  - Lakes --
KW  - Rivers --
KW  - Stream ecology --
KW  - Juvenile literature
ER  -