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.
JOHNSON HIGH-TEST OIL COMPANY
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JOHNSON HIGH-TEST OIL COMPANY. The 1934 Dubuque City Directory listed E. 4th, 895 and 3202 Central, 998 Locust, 801 and 2501 Rhomberg and E. 6th.
The 1939 Dubuque City Directory listed 300 E. 6th.