"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.
NATIONAL REFINING COMPANY
NATIONAL REFINING COMPANY. The 1911-12 Dubuque City Directory through the 1916-1917 White's Dubuque County Directory listed 500 S. Main as the address.
The 1923 and 1929 Dubuque City Directory listed 7th at the corner of Wall.
The 1934 Dubuque City Directory listed stations at 102 E. 21st, 398 Iowa and 1081 Julien.
The 1939 and 1941 Dubuque City Directory listed 400 E. 7th