por Schad, Theodore M [editor] | Tennessee Valley Authority | American Water Resources Association. Conference (20 : 1984 : Washington, D. C.).
por International Symposium on Biofouled Aquifers-Prevention and Restoration | Cullimore, D. Roy [editor] | American Water Resources Association.
por International Symposium on Water-related HEalth Issues | Tate, Chester L [editor] | American Water Resources Association.