Conservation, Protection, and Propagation of Endangered Species of Fish and Wildlife: Hearing Before the Merchant Marine and Fisheries Subcommittee of the Committee on Commerce, United States Senate, Eighty-ninth Congress, First Session on S. 2217, a Bill to Provide for the Conservation, Protection, and Propagation of Native Species of Fish and Wildlife, Including Migratory Birds, that are Threatened with Extinction; to Consolidate the Authorities Relating to the Administration by the Secretary of the Interior of the National Wildlife Refuge System; and for Other Purposes, August 12, 1965