TY  - BOOK
AU  - Scheffer, Marten  .
TI  - Ecology of shallow lakes / 
SN  - 1-4020-2306-5
U1  - G:5(delta,254) 
PY  - 2004///
CY  - The Netherland : 
PB  - Kluwer Academic Publishers , 
KW  - Forestry- Shallow lakes ecology
ER  -