Columbia subject headings:
Benthos--United States.
Freshwater ecology--United States.
Stream ecology--United States.
Water quality biological assessment--United States.
Harvard subject headings:
Benthos--United States.
Freshwater ecology--United States.
Stream ecology--United States.
Water quality biological assessment--United States.
Princeton subject headings:
Benthos--United States.
Freshwater ecology--United States.
Stream ecology--United States.
Water quality biological assessment--United States.