GEOLOGIC ATLAS OF THE UNITED STATES; ELKTON-WILMINGTON FOLIO, MARYLAND-DELAWARE-NEW JERSEY-PENNSYLVANIA; FOLIO 211
Washington, DC: United States Geological Survey [USGS], 1920. First edition. Large folio. Printed wrappers. Twenty-two pages with "Description of the Elkton-Wilmington Quadrangles," with two pages of "Geologic Atlas of the United States," two two-page fine and bright maps showing, besides geologic features, roads, railroads and towns, and partial page of..... More