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U S Extended Continental Shelf Task Force : The national effort to establish the full extent of the continental shelf of the United States : a strategic plan / produced by the U.S. Extended Continental Shelf Task Force.
U S Fish And Wildlife Service Annapolis Field Office : Appalachian northern flying squirrels (Glaucomys sabrinus fuscus) (Glaucomys sabrinus coloratus) / prepared by Annapolis Field Office, U.S. Fish and Wildlife Service in cooperation with the Northern Flying Squirrel Recovery Team for Region 5, U.S. Fish and Wildlife Service.