, Warren D. From Shafts to Wires: Historical Perspective on Electrification (PDF). Journal of Economic History. 1983, 43 (2): 355 [2011-07-03]. S2CID 153414525
States Geological Survey. St. Louis County. Jim Forte Postal History. [2015-08-07]. (原始内容存档于2016-01-15). Upham, Warren. Minnesota Geographic Names: Their
Princeton, NJ, Princeton University Press, 1949 Roberts, Warren. Jacques-Louis David and Jean-Louis Prieur, Revolutionary Artists: The Public, the Populace
States Geological Survey. St. Louis County. Jim Forte Postal History. [2015-08-07]. (原始内容存档于2016-01-15). Upham, Warren. Minnesota Geographic Names: Their