1913. Gilbert, B. D., Kirk, N. M., Smith, William G. (Surveyor), Snyder & Black Lithogrs., United States. Bureau of Chemistry and Soils, and Westover, Harvey Leroy. Cartographic Details: Scale [1:63,360]. 1 in. = 1 mile (W 93°03'--W 92°15'/N 44°45'--N 44°10'). In lower right margin: Field operations, Bureau of ...