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- Caspian tern -- Food -- Columbia River Estuary (Or. and Wash.)4
- Caspian tern -- Ecology -- Columbia River Estuary (Or. and Wash.)3
- Double-crested cormorant -- Ecology -- Columbia River Estuary (Or. and Wash.)3
- Double-crested cormorant -- Food -- Columbia River Estuary (Or. and Wash.)3
- Oregon State University. College of Agriculture Science -- Periodicals2
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