Columbia subject headings:
Agriculture--North Dakota.
Frontier and pioneer life--North Dakota.
North Dakota--Social life and customs.
Harvard subject headings:
Agriculture--North Dakota.
Frontier and pioneer life--North Dakota
North Dakota--Emigration and immigration.
North Dakota--Social life and customs.
Princeton subject headings:
Agriculture--North Dakota.
Frontier and pioneer life--North Dakota.
North Dakota--Social life and customs.