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Marketing research : its function, scope, and method
Phelps, Dudley Maynard, (1937)
Migration of industry to South America
Phelps, Dudley Maynard, (1936)
Effect of the foreign market on the growth and stability of the American automobile industry : Phelps, D[udley] M[aynard]
Phelps, Dudley Maynard, (1931)