Description of the fossils and shells collected in California by William P. Blake, geologist of the United States Pacific Railroad Survey in California, under the command of Lieut. R.S. Williamson, in 1853-54.

By Blake, William P..
Washington, 1855 .
34 p. , Cover-title. | Running title: H. doc. 129. | Half-title: Explorations and surveys for a railroad route from the Mississippi River to the Pacific Ocean.--War Department. Appendix to the preliminary geological report of William P. Blake ... Palaeontology. 23 cm..

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Report of a reconnaissance and survey in California, in connexion with explorations for a practical railway route from the Mississippi River to the Pacific Ocean in 1853 /

By Williamson, R. S..
[Washington : s.n., 1855 .
61, 80 p. : , Also published in: Report of the Secretary of War communicating the several Pacific railroad explorations, v. 3, report X. | Includes the "Preliminary geological report by William P. Blake, geologist and mineralogist of the survey." | Plates: [1] General map of a survey of California in connection with examinations for railroad routes to the Pacific Ocean made by order of the War Department, by R.S. Williamson ... [2] Route of a survey from the Pimas villages on the Rio-Gila to Mesilla on the Rio-Bravo-Del-Norte with a view to determine the practicability of a railroad from the Mississippi to the Pacific Ocean, made by Jno. G. Parke ... 24 cm..

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Description of the fossils and shells collected in California by William P. Blake, geologist of the United States Pacific Railroad Survey in California, under the command of Lieut. R.S. Williamson, in 1853-54.

Report of a reconnaissance and survey in California, in connexion with explorations for a practical railway route from the Mississippi River to the Pacific Ocean in 1853 /