William H. Nicholls
Iowa State College
The writer gratefully acknowledges the aid and counsel of two professors of public law, Jerome G. Kerwin and C. H. Pritchett of the University of Chicago; and the criticisms of the manuscript by two colleagues, Professors T. W. Schultz and Margaret Reid. He is also deeply indebted to the Social Science Research Council for the post-doctoral fellowship during 1941–42 which made the present study possible.
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