1948. Disturnell, John, 1801-1877. Area covered includes the southwestern part of the present United States.;Carta de los caminos &c. desde Vera Cruz y Alvarado a Méjico.;Chart of t... J. Disturnell (New York).
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1948. Geological Survey (U.S.). Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods 1946.;Contour interval 20 feet.;Coordin... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1948. Geological Survey (U.S.). Contour interval 20 feet;Mapped by the Geological Survey 1946.";10 foot contours added in dashed lines.";Relief shown by contours and spot heights.... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1948. Geological Survey (U.S.). Contour interval 20 feet;"Mapped by the Geological Survey 1943-1944";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1948. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey, 1946";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1948. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey 1946"; (W 91⁰15ʹ00ʺ--W 91⁰00ʹ00ʺ/N 41⁰30ʹ00ʺ--N 41⁰15ʹ00ʺ);Relief shown by contours and... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).