A benthic-macroinvertebrate index of biotic integrity and assessment of conditions in selected streams in Chester County, Pennsylvania, 1998-2009 by Andrew G. Reif ; prepared in cooperation with the Chester County Water Resources Authority.
|Format:||Book Government Document|
Reston, Va. :
U.S. Dept. of the Interior, U.S. Geological Survey,
|Series:||Scientific investigations report ;