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A Biological Survey of North Dakota
(1926)
In the preliminary survey of the wild life of North America information has been gathered on the birds and mammals of the country at large, and provisional maps of the life zones of the
continent and subdivisions of it ...
Types of Farming in North Dakota
(1928)
Methods are presented which indicate how special tabulations of census data may be used to supplement the usual agricultural census data in arriving at important type-of-farming areas in the State and in determining the ...