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December 21, 1837 -
DUBUQUE lost to creation of BENTON, BUCHANAN, CEDAR, CLAYTON, CLINTON, DELAWARE, FAYETTE, JACKSON, JOHNSON, JONES, KEOKUK, LINN, and SCOTT.
(Wis. Terr. Laws 1837, no. 6; secs. 1-20/pp. 133-137)
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October 01, 1834 -
December 21, 1837
DUBUQUE created by Michigan Territory from non-county area in present Iowa, Minnesota, and North and South Dakota.
(Mich. Terr. Laws, 3:1326-1327)
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