Report of a reconnaissance from Carroll, Montana territory, on the upper Missouri, to the Yellowstone national park, and return
Subtitle: made in the summer of 1875
By: by William Ludlow, Captain of engineers ... Being Appendix NN of the Annual report of the chief of engineers for 1876.
Series: History of the Pacific Northwest, PNW -- no. 275, Research Publications, Inc.  Microfilm, Reel 26.; Western Americana, 1550-1900 -- reel 550, no. 5540.; History of the Pacific Northwest -- PNW no. 275, Research Publications, Inc. microfilm, reel 26.
Publisher: Govt. Print. Off.
Published: 1876
Place of publication: Washington
Language: eng
Format: Microform
Number of pages: 141
Subjects: Ludlow, William, -- 1843-1901; Paleontology -- Montana; Geology -- Montana; Zoology -- Montana; Yellowstone National Park; Montana -- Description and travel; United States -- Discovery and exploration
Notes: Microfilm. New Haven, Conn. : Research Publications, Inc., 1975. 1 microfilm reel ; 35 mm. (Western Americana: Frontier History of the Trans-Mississippi West, 1550-1900, Reel 550, No. 5540) 
Table of contents: title: General report, W. Lidlow.; title: Trip to the Judith basin; trip from Carroll to Ellis via Yellowstone river, by R. E. Thompson.; title: Zoological report,  by G. B. Grinnell.; title: Geological report, by E. S. Dana and G. B. Grinnell.; title: Description of new fossils, by R. P. Whitfield.