1909. Bownocker, J. A. (John Adams), 1865-1928. ... efter de Geologiska kartbladen.; "A.-B. Kartografiska Institutet"--lower right margin.; "Sveriges Geologiska Underso?kning Ser. Ba. Nr 11." 82 ... A. Hoen & Co (Baltimore).
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1910. Geological Survey (U.S.). Monograph LII Plate IV. 23 x 119 centimeters Scale 1:125,000 General Map Collection. A. Hoen & Co (Baltimore).
1910. Leith, C. K. (Charles Kenneth), 1875-1956. Cover title: Physical geography.; At head of title: Mitchell's school geographies, fifth book of the series. 15 x 21 centimeters Scale 1:1,250,000 ... A. Hoen & Co (Baltimore).
1925. Maryland Geological Survey. Relief shown by contours. 66 x 91 centimeters Scale 1:62,500 General Map Collection. A. Hoen & Co (Baltimore).