TY - BOOK AU - Loeb,Stanford L. AU - Spacie,Anne TI - Biological monitoring of aquatic systems SN - 0873719107 (acidfree paper) AV - QH 96.8 .B5B56 1994 U1 - 574.5/2632/0287 20 PY - 1994/// CY - Boca Raton PB - Lewis Publishers KW - Water quality biological assessment KW - Congresses KW - Indicators (Biology) KW - Freshwater ecology N1 - Papers presented at a symposium held Nov. 29 - Dec. 1, 1990, at Purdue University; Includes bibliographical references and index UR - http://www.loc.gov/catdir/enhancements/fy0744/93034962-d.html ER -