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June 05, 1845 -
JOHNSON gained from WASHINGTON.
(Iowa Terr. Laws 1845, ch. 45, sec. 1/pp. 66-67)
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January 25, 1839 -
June 05, 1845
JOHNSON lost to WASHINGTON.
(Iowa Terr. Laws 1838-1839, pp. 100-101)
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December 21, 1837 -
January 25, 1839
JOHNSON created by Wisconsin Territory from COOK (extinct), DUBUQUE, MUSCATINE, and Non-County Area 1.
(Wis. Terr. Laws 1837, no. 6; secs. 14, 16/pp. 135-136)
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