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These terms define your current search. Click the × to remove a term. Research, Technology and Engineering: technology > transportation > bridges × 2 results Group by: Research, Technology and Engineering   (Click to View) Evidence of spawning by green sturgeon, Acipenser medirostris, in the upper Sacramento River, California Environmental biology of fishes (Click to View) Painted surfaces - Important sources of polychlorinated biphenyls (PCBs) contamination to the urban and marine environment Environmental pollution