North Dakota Directories
Directories of heads of households have been published for major cities in North Dakota. For example, the Family History Library has directories for Bismarck for the years 1938, 1940, 1960, 1965, 1975, 1980, and 1986 (FHL book 978.477/B1 E4p.)
Regional business directories that include present-day North Dakota:
Northwestern Gazetteer: Minnesota, North and South Dakota and Montana Gazetteer and Business Directory. St. Paul, Minnesota: Polk, 1914 (FHL Films 1321220-1321221).
The Leading Business Men of Dakota Cities: Accompanying the Map of Dakota Territory, Name and Address. Minneapolis, Minnesota: Warner & Foote, 1883 (FHL Film 1464014 Item 18).