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by -- Aquatic Plant Control Research Program (U.S. Army Engineer Waterways Experiment Station)Meeting(29th : 1994 : Vicksburg, Miss.); U.S. Army Engineer Waterways Experiment Station; United StatesArmy.Corps of Engineers.
by -- U.S. Army Engineer Waterways Experiment Station -- (28th : Aquatic Plant Control Research Program (US Army Engineer Waterways Experiment Station). 993 : Baltimore, Md.).
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