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1
The District of Columbia, its rocks and their geologic history
Published: U.S. G.P.O., 1950Description: v, 59 pages : illustrations, maps ; 24 cm.Book -
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The District of Columbia, its rocks and their geologic history : with notes on the geography, early history and stone used in buildings and monuments
Published: United States Department of the Interior, Geological Survey, 1950Description: 1 online resource (v, 59 pages, 4 pages of plates) : illustrations, maps (some color).Government Document eBook