TY  - BOOK
AU  - Harper,David M.
TI  - Eutrophication of freshwaters: principles, problems and restoration 
SN  - 0-412-32970-0
AV  - QH96.8 .E9 H37
PY  - 1992///
CY  - New York
PB  - Chapman & Hall
N1  - Incluye bibliografia
ER  -