Title: GAO's study of the national park system
Subtitle: Joint hearing before the Subcommittee on Parks, Historic Preservation, and Recreation of the Senate Committee ... national park system, March 7, 1995 (S. hrg)
Subjects: Management, National park concessions, United States, United States. National Park Service, Conservation of natural resources, National parks and reserves, United states, national park service, National parks and reserves, united states, Concessions, Concessions (Amusements, etc.)