Water quality biological assessment.

Biomonitoring of water and waste water by: (Language materials, printed)

Monitoring ecological impacts : = concepts and practice in flowing waters / by: (Language materials, printed)

Sewage

Biodiversity.

Water quality biological assessment.

Life Sciences, general.

Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution.

Stream ecology.

Environmental Engineering/Biotechnology.

Biological monitoring.

Environment.