Entrance and user fees within the National Park System : hearing 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 5, 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. 96-11."
National parks and reserves