Cowpens National Battleground Site, Piscataway National Park, John D. Rockefeller, Jr., Memorial Parkway, Gulf Islands National Seashore, and Wolf Trap Farm Park, hearings before Subcommittee on Parks and Recreation, 92d Congress, 2d session, on S. 1552, S. 1291, S. 3159, S. 3153 [and] S. 2725, Feb. 27 and 28, 1972.