Report of a reconnaissance of the Black hills of Dakota, made in the summer of 1874. [electronic resource] Being Appendix PP of the Annual report of the Chief of engineers for 1875. By William Ludlow.
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Digital Library Initiatives, 2000. Includes both TIFF files and keyword searchable text. [Making of America] This volume is made possible by a grant from the Andrew W. Mellon Foundation as part of Making of America IV: the American voice, 1850-1877.
