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1882

Geological Map of the United States.

National Atlas

Gray's Geological Map of the United Stat …

1873

Text: Geological Description (of the Uni …

World Atlas

(Text Page) Geological Description (of t …

1873

United States Showing the Principal Geol …

World Atlas

Gray's Atlas Map of the United States Sh …

1873

Text: Geological Description (of the Uni …

World Atlas

(Text Page) Geological Description (of t …

1884

Text: Geological Description of the Unit …

National Atlas

(Text Page) Geological Description (of t …

1884

Text: Geological Description of the Unit …

National Atlas

(Text Page) Geological Description (of t …