Report of a reconnaissance from Carroll, Montana Territory, on the upper Missouri, to the Yellowstone national park, and return, made in the summer of 1875, - Ludlow, William, 1843-1901; Thompson, R. E.; Grinnell, George Bird, 1849-1938; Dana, Edward Salisbury, 1849-1935; Whitfield, R. P. (Govt. Print. Off., 1876)