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These terms define your current search. Click the × to remove a term. Research, Technology and Engineering: technology > transportation > bridges × 2 items, grouped by Natural Resources, Earth and Environmental Sciences (view ungrouped items) ecology (1)    (Click to View) Evidence of spawning by green sturgeon, Acipenser medirostris, in the upper Sacramento River, California Environmental biology of fishes environmental science (1)    (Click to View) Painted surfaces - Important sources of polychlorinated biphenyls (PCBs) contamination to the urban and marine environment Environmental pollution natural resource management (1)    (Click to View) Evidence of spawning by green sturgeon, Acipenser medirostris, in the upper Sacramento River, California Environmental biology of fishes natural resources (1)    (Click to View) Painted surfaces - Important sources of polychlorinated biphenyls (PCBs) contamination to the urban and marine environment Environmental pollution