The population, labor force, and income of North Dakota, 1900-1975 - North Dakota. University. Bureau of Business and Economic Research; Kelley, Samuel C.; Kelley, Samuel C. ([Grand Forks] Bureau of Economic and Business Research, University of North Dakota, in cooperation with the Bureau of Reclamation, U.S. Dept. of the Interior, 1954)
Keywords: Labor supply -- North Dakota; North Dakota -- Population