Statistics for occurrence #1 of “Missouri River” in entry united-states-of-america-missouri of Harper's Encyclopedia of United States History:

... of Louisiana, set off from the Territory of Louisiana, and placed under the government of Indiana Territory by act of Congress......March 26, 1804 Exploring expedition of Lewis and Clarke up the Missouri River leaves St. Louis......May 14, 1804 By act of Congress the district of Louisiana is regularly organized into the Territory of Louisiana, and President Jefferson appoints Gen. James Wilkinson as go...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Missouri River (Kansas, United States) 30 12 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.