
Langford, Nathaniel Pitt 1832-1911 The Discovery of Yellowstone Park, 1870: the Complete Story of the Washburn Expedition to the Headquarters of the Yellowstone and Firehole Rivers in the Year 1870

Langford, Nathaniel Pitt 1832-1911 Vigilante Days and Ways; the Pioneers of the Rockies: the Makers and Making of Montana, Idaho, Oregon, Washington, and Wyoming; Vol. 1

Langford, Nathaniel Pitt Vigilante Days and Ways: The Pioneers of The Rockies : The Makers and Making of Montana, Idaho, Oregon, Washington, and Wyoming; Volume 1

Langford, Nathaniel Pitt Vigilante Days and Ways: The Pioneers of The Rockies : The Makers and Making of Montana, Idaho, Oregon, Washington, and Wyoming; Volume 2

Langford, Nathaniel Pitt Vigilante Days and Ways: The Pioneers of The Rockies : The Makers and Making of Montana, Idaho, Oregon, Washington, and Wyoming; Volume 1

Wheeler, Olin Dunbar Nathaniel Pitt Langford: The Vigilante, The Explorer, The Expounder and First Superintendent of The Yellowstone Park