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- Caspian tern -- Ecology -- Columbia River Estuary (Or. and Wash.)1
- Caspian tern -- Food -- Columbia River Estuary (Or. and Wash.)1
- Double-crested cormorant -- Ecology -- Columbia River Estuary (Or. and Wash.)1
- Double-crested cormorant -- Food -- Columbia River Estuary (Or. and Wash.)1
- Polychlorinated biphenyls -- Bioaccumulation -- Columbia River Estuary (Or. and Wash.)1
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