National Park Service concessions policy : hearings before the Subcommittee on Parks, Recreation, and Renewable Resources of the Committee on Energy and Natural Resources, United States Senate, Ninety-sixth Congress, first session ... March 29, April 23 and 27, 1979.
United States.Congress.Senate.Committee on Energy and Natural Resources.Subcommittee on Parks, Recreation, and Renewable Resources.
Washington : U.S. Govt. Print. Off.,
1979.
"Publication no. 96-33."
United States. National Park Service
National park concessions