1. Recreational use of River Terraces 2. Revetment Harmonious with a River's Environment 3. Improvement of Reservoir Water Quality 4. River Purification Projects 5. Water Quality Improvement Vessel 6. Biological Index of Water Quality in Japan [video cd]
1. Recreational use of River Terraces 2. Revetment Harmonious with a River's Environment 3. Improvement of Reservoir Water Quality 4. River Purification Projects 5. Water Quality Improvement Vessel 6. Biological Index of Water Quality in Japan [video cd]
- Japan [date of publication not identified]
- 1 video cd
Ricers--Japan.
Water quality--Japan.
Ricers--Japan.
Water quality--Japan.