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Preliminary report of the United States Geological Survey of Wyoming, and portions of contiguous territories : (being a Second annual report of progress) : conducted under the authority of the Secretary of the Interior / by F.V. Hayden. – Washington : Government printing office, 1871. – 511 p.
LETTER TO THE SECRETARY.
PART I.
PART II.
PART III.
PART IV.
PART V.
APPENDIX.
GENERAL INDEX