TY  - BOOK
AU  -  Klemm,Donald J.
ED  -  United States. 
TI  -  Macroinvertebrate field and laboratory methods for evaluating the bi ological integrity of surface waters / 
PY  - 1990///
CY  -  Washington, D.C. : 
PB  -  United States Environmental Protection Agency, 
KW  -  Water quality measurement
KW  -  Fresh water assessment
N1  -  Includes bibliographical references
ER  -