. . . . . . . . . . . . . . . . . . "Weed control methods for recreation facilities management"@en . "Weed control methods for recreation facilities management" . . . . . . . "Coasts and benefits of aquatic weed control; Using herbicides effectively in lakes and ponds; Control of macrophytic growth by naturally produced substances; Problems of weed control in aquatic sites; The role of herbicide residues of 2,4-D in the aquatic ecosystem; The role of algae in aquatic ecosystems; The role of algae in aquatic ecosystems; Stone valey recreational lake study; Aquatic plants in stoner creek in the vicinity of Paris, Kentucky; Aquatic plant problem in lake Taneycomo; Water quality evaluations of the Lower Mystic lake, Massachusetts; The problem of ameobic meningoenchphalitis in water resource planning; Aquatic plant control in Kitty Hawk Bay; Aquatic weeds in lake Seminole; Aquatic plant control problems at Sam Rayburn Reservoir; Controlof water hyancinth in the St. Johns River, Putnam County, Florida; Aquatic weed control in a potable water reservoir; Eurasian watermilfoil; Screening tests of 2,4-D; Chesapeake Bay study; Eurasian watermilfoil studies in New Jersey; Eurasian watermilfoil studies in Florida." . . . . "Aquatic sports facilities." . . "Fitofarmaci - Residui nelle acque." . . "Recreation areas." . . "Mauvaises herbes aquatiques." . . . . "Aquatic weeds." . . "Piante acquatiche - Controllo." . . "Centres de loisirs." . .