Groundwater Quality Regulation: Existing Governmental Authority and Recommended Roles Reprinted from Columbia Journal of Environmental Law, vol. 14, no. 1, 1989. Groundwater Data and Resources SR12 Groundwater Quality Regulation: Existing Governmental Authority and Recommended Roles Yanggen, D.A.; Amrhein, L.L.; 1989 Report: 109 p. Download Related Collections Special Report View Special Report