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Encyclopedia Dubuque


"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN

Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.


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GEORGE ZUMHOF & SON. The 1878-79 Dubuque City Directory listed the northwest corner of Clay and 4th.

The 1880 Dubuque City Directory stated that this business was located at 413 Clay.

George Zumhof by himself was listed in the 1886-87 Dubuque City Directory.