"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
JOHN A. VOELKER & SON
JOHN A. VOELKER & SON. The 1913 Dubuque and Dubuque County Directory through the 1923 Dubuque City Directory stated that this business was located at 1487 Clay.