• Titelblatt

    Geological map of Baltimore and vicinity

    published by the John Hopkins University on the topographic base of the U.S. Geological Survey
    Williams, George Huntington [1856-1894] ; Darton, Nelson Horatio [1865-1948] ; Johns Hopkins University
    ETH-Bibliothek, Rar KS 785
  • Titelblatt

    A preliminary geological map of Maryland

    inasmuch as the different geological formations give rise to soils of a definite character, this may also serve as an agriculture map
    Whitney, Milton [1860-1927] ; Darton, Nelson Horatio [1865-1948] ; Williams, George Huntington [1856-1894] ; Keith, A. ; Geiger, H. R. ; Tyson, P. T. ; White, I. C. ; United States Geological Survey ; A. Hoen & Co
    ETH-Bibliothek, Rar KS 863