United States. Environmental Protection Agency. Office of Research and Monitoring

• An in situ evaluation of nutrient effects in lakes
• Data acquisition systems in water quality management
• Environmental impact requirements in the states
• Environmental protection through public and private development controls
• Estimating water quality benefits
• EXPRO '73
• Michigan water resources enforcement and information system
• Proceedings, second national symposium on food processing wastes
• Projects of the pollution control analysis section
• Research supplement to Journal, Water Pollution Control Federation
• Restoration of beaches contaminated by oil
• State-of-art review