Report of the Geological Exploration of the Fortieth Parallel, made by order of the Secretary of War according to acts of Congress of March 2, 1867, and March 3, 1869
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 (University of Michigan)) 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.
Mode of access: World Wide Web.
CONTENTS: v.4, pt. 1. Palaeontology, by F. B. Meek.--v.4, pt. 2. Palaeontology, by James Hall and R. P. Whitfield.--v.4, pt. 3. Ornithology, by Robert Ridgway.--v.5. Botany, by Sereno Watson, aided by Daniel C. Eaton, and others.--v.7. Odontornithes, a monograph on the extinct toothed birds of North America, by O. C. Marsh