1882. 2003-07-16T14:55:15Z. 2020-08-20T20:42:35Z. Geological Survey (U.S.). s.n. English. Public. Washington Region and Washington Metropolitan Area.
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1947. 2003-07-23T12:22:55Z. 2015-04-21T22:11:50Z. Geological Survey (U.S.). Federal Works Agency, Public Roads Administration ; For sale by the Supt. of Docs., U.S. G.P.O. English. Public. Washington (D.C.) and Washington Metropolitan Area.