Rocky Mountain National Park and the Land and water conservation fund act : hearing, Ninety-third Congress, second session on S. 2394, a bill to authorize the acquisition of certain lands for addition to Rocky Mountain National Park in the State of Colorado, and for other purposes; [and] S. 2844, a bill to amend the Land and Water Conservation Fund Act, as amended, to provide for collection of special recreation use fees at additional campgrounds, and for other purposes, February 7, 1974.