Shenandoah, Great Smoky Mountains, and Mammoth Cave national parks, hearings, 69th Congress, 1st session, on H. R. 11287, for establishment of Shenandoah National Park in Virginia and Great Smoky Mountains National Park in North Carolina and Tennessee [and] H. R. 12020, for establishment of Mammoth Cave National Park in Kentucky, May 11, 1926.