TY  - BOOK
AU  - Loeb, Stanford L.
TI  - Biological monitoring of aquatic systems
SN  - 0873719107
U1  - 577.6 
PY  - 1994///
CY  - Boca Raton
PB  - CRC Press
KW  - Water quality bioassays
KW  -  Congresses
KW  - Freshwater ecology
N1  - Papers presented at a symposium held Nov. 29-Dec 1, 1990 at Purdue U niversity; Includes bibliographical references and index
ER  -