TY  - BOOK
AU  - Loeb, Stanford L
AU  -  Spacie Anne
TI  - Biological monitoring aquatic systems 
SN  - 0873719107
AV  - DASF QH96.8.B5 
PY  - 1994///
CY  - Boca Raton.
PB  -  : Lewis Publishers.
KW  - Water quality biological assessment
KW  - Indicators ( Biology)
KW  -  Freshwater ecology
N1  - Includes bibliographical references and index
ER  -