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.
MCMAHON COMPANY
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MCMAHON COMPANY. The 1959 Dubuque City Directory listed 544 Main.
The 1966 and 1968 Dubuque City Directory listed the same address for McMahon Real Estate and Insurance.

