Exploring nature's sanctuary
Subtitle: Captain William Ludlow's 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
By: introduction by Paul K. Walker
Contributors: Walker, Paul K.; United States. Army. Corps of Engineers. Historical Division
Series: Engineer historical studies -- no. 3; Engineer historical studies -- no. 3.
Publisher: Historical Division, Office of Administrative Services, Office of the Chief of Engineers; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1985
Place of publication: Washington, D.C.?]
Language: eng
Subjects: Description and travel; Frontier and pioneer life
Notes: 3 folded maps in pocket.

Includes bibliographical references and index.