National Water Well Association,
Agricultural Impacts on Ground Water--a Conference (1988 : Des Moines, Iowa)
Agricultural Impacts on Ground Water--a Conference (1988 : Des Moines, Iowa)
Association of Ground Water Scientists and Engineers (U.S.)
91.0200 (ABSTRACTS, DAY 1)
Agricultural Impacts on Ground Water Conference : [conference schedule and abstracts].
Agricultural Impacts on Ground Water Conference : [conference schedule and abstracts].
Agricultural Impacts on Ground Water Conference :
Agricultural Impacts on Ground Water--a Conference (1988 : Des Moines, Iowa)