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.
A. TIEFENBRUNN
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A. TIEFENBRUNN. The 1870-1871 Dubuque City Directory gave the address as the east side of Clay between 10th and 11th.