TY  - BOOK
AU  - Loeb,Stanford L.
AU  - Spacie,Anne
TI  - Biological monitoring of aquatic systems / 
SN  - 0873719107
U1  - 577.60287 
PY  - 1994///
CY  - Boca Raton : 
PB  - Lewis Publishers , 
KW  - FRESHWATER ECOLOGY-CONGRESSES
N1  - NULL
ER  -