- Democratic National Committee (U.S.)1
- Dixon Media Group, Inc.1
- Ferguson, Homer, 1888-19821
- Halley, Rudolph, 1913-19561
- Hatch, Carl Atwood, 1889-19631
- Hawthorne Group1
- Jay and/or Carla Rose1
- Library of Congress. Legislative Reference Service. American Law Division1
- MCSSR1
- McKellar, Kenneth Douglas, 1869-19571
- Mead, James M. (James Michael), 1885-19641
- MediaPartners1
- Metro Production1
- Patterson, Robert Porter, 1891-19521
- Payne and Company, Inc.1
- Roy Fletcher, Inc.1
- Severn/Aviles/Associates/Inc.1
- Squier Knapp Ochs Dunn1
- The Campaign Group, Inc.1
- Tunnell, James M. (James Miller), 1879-19571
