"Mississippi River ," by James Harrison Wilson in The American Cyclopædia (1879)
Life on the Mississippi by Mark Twain (1883)
"Mississippi (River) ," by H. L. Abbot in Encyclopædia Britannica, Ninth Edition (v. 16) (1883)
"Mississippi River ," by Cyrus C. Adams and others in The New International Encyclopædia , New York: Dodd, Mead and Co. (1905)
"Mississippi River ," in The Nuttall Encyclopædia , (ed.) by James Wood , London: Frederick Warne and Co., Ltd. (1907)
"Mississippi River ," in Encyclopædia Britannica (11th ed., 1911)
"Mississippi (river) ," in The New Student's Reference Work , Chicago: F.E. Compton and Co. (1914)
"Mississippi River ," by Forrest Morgan in The Encyclopedia Americana , New York: The Encyclopedia Americana Corporation (1920)
"Mississippi River ," in Collier's New Encyclopedia , New York: P. F. Collier & Son Co. (1921)