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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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STANDARD OFFICE SUPPLY CO. The 1911-1912 Dubuque City Directory listed 312-312 1/2 Security Building.

The 1913 Dubuque and Dubuque County Directory stated that this business was located at 356-364 Main.

The 1916-1917 White's Dubuque County Directory listed 850-56 Main as the address.