Books by Dudley Maynard Phelps:
Books in the extended shelves:
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Phelps, Dudley Maynard, 1897-: Marketing management (R.D. Irwin, 1960), also by J. Howard Westing (page images at HathiTrust)- Phelps, Dudley Maynard, 1897-: Sales management; policies and procedures. (R.D. Irwin, 1951) (page images at HathiTrust)
Find more by Dudley Maynard Phelps at your library, or elsewhere.