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.
CARL ZOLLER
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CARL ZOLLER. The 1904 and 1909 Dubuque City Directory located the business at 1472 Iowa.
The 1911-12 Dubuque City Directory listed 2026 Couler.