Bradford, W. J. A. 1. (1846). Notes on the Northwest, or valley of the upper Mississippi: Comprising the country between lakes Superior and Michigan, east ; the Illinois and Missouri Rivers, and the northern boundary of the United States ; including Iowa and Wisconsin, part of Michigan northwest of the Straits of Mackinaw, and northern Illinois and Missouri. New York: Wiley and Putnam.

Bradford, Wm. J. A. 1791-1858. Notes On the Northwest, or Valley of the Upper Mississippi: Comprising the Country between Lakes Superior and Michigan, East ; the Illinois and Missouri Rivers, and the Northern Boundary of the United States ; Including Iowa and Wisconsin, Part of Michigan Northwest of the Straits of Mackinaw, and Northern Illinois and Missouri. New York: Wiley and Putnam, 1846.

Bradford, Wm. J. A. 1791-1858. Notes On the Northwest, or Valley of the Upper Mississippi: Comprising the Country between Lakes Superior and Michigan, East ; the Illinois and Missouri Rivers, and the Northern Boundary of the United States ; Including Iowa and Wisconsin, Part of Michigan Northwest of the Straits of Mackinaw, and Northern Illinois and Missouri. New York: Wiley and Putnam, 1846.