Water quality bioassay - Congresses.

Biological monitoring of water and effluent quality : = a symposium, Blacksburg, Va., 2-4 Nov. 1975 / by: (Language materials, printed)

Biological methods for the assessment of water quality : = a symposium presented at the seventy-fifth annual meeting, American Society for Testing and Materials / by: (Language materials, printed)

Water quality bioassay- Congresses.

Environmental monitoring- Congresses.

Water quality biological assessment- Congresses.

Indicators (Biology)- Congresses.