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.
HELMER-DENZLER COMPANY
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HELMER-DENZLER COMPANY. The 1923 Dubuque City Directory listed 120 W. 6th.
The 1929 Dubuque City Directory listed 214 W. 1st for the upholsterer.