TY  - BOOK
AU  - van der valk Arnold G
TI  - Biology of freshwater wetlands
T2  - Biology of habitats series
SN  - 0198525400 (pbk)
U1  - G9557, P6   TG 
PY  - 2006///
CY  - Oxford
PB  - Oxford University Press     
KW  -  Wetland
KW  -  Wetland environments
KW  -  Wetland environmetns
KW  - Enviornmental biology
N1  - Glossary 150-154p.; Bibliography 155-168p.; Index 169-173p
ER  -