Yellowstone National Park. Revising boundaries of Yellowstone National Park, hearing, 70th Congress, 2d session, on S. 2571, to revise boundary of Yellowstone National Park in Wyoming, S. 3001, to revise boundary of Yellowstone National Park in Montana and Wyoming, S. 4674, to establish Grand Teton National Park in Wyoming, to revise boundary of Yellowstone National Park in Montana, Wyoming, and Idaho, and for other purposes, Jan. 22, 1929.