Statistics for occurrence #1 of “Oklahoma” in entry boycotting of Harper's Encyclopedia of United States History:

...ss stringent laws against boycotting have been enacted in Illinois, Wisconsin, Colorado, Connecticut. Maine. Massachusetts, New Hampshire, New York, Alabama. Florida, Georgia. Michigan, North Dakota, Oklahoma . Oregon, South Dakota, Texas, Utah, and Vermont.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Oklahoma (Oklahoma, United States) 816 332 0 0 0 user votes
Oklahoma (Kentucky, United States) 2 2 0 0 0 user votes
Oklahoma (Missouri, United States) 2 2 0 0 0 user votes
Oklahoma (Louisiana, United States) 0 0 0 0 0 user votes
Oklahoma (Mississippi, United States) 0 0 0 0 0 user votes
Oklahoma (Ohio, United States) 0 0 0 0 0 user votes
† Oklahoma (Oklahoma, United States) 0 0 0 0 0 user votes
Oklahoma (Pennsylvania, United States) 0 0 0 0 0 user votes
Oklahoma (Pennsylvania, United States) 0 0 0 0 0 user votes
Oklahoma (Texas, United States) 0 0 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.