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.
JOHN C. DUFFEY
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JOHN C. DUFFEY. The 1951 Dubuque City Directory listed 408 BANK AND INSURANCE BUILDING.
The 1955 and 1957 Dubuque City Directory listed 715 FISCHER BUILDING.
The 1959 Dubuque City Directory listed 985 Main.
The 1962 and 1966 Dubuque City Directory listed 724 Roshek Building.
The 1968 Dubuque City Directory listed 911 Locust for John C. Duffey Insurance and Real Estate.