Brett Kahr; Roger Kennedy; Otto Kernberg; Pearl King.
A Kallir; Robert A Kann; V B Kanter; Mona M Karff; Richard Karpe; Naomi Katcher; Betty Katkov; Walter Kaufmann; Hans Keller; Norman Kelman; John C Kenna; Trevor Kilborn; Humphrey S[?] King; Mina Kirstein (see also Eleanor Chilton, ref. P04-C-B-13, and Henrietta Bingham, ref. P04-C-F-02); John Klauber; F D Klingender; Clyde Kluckhohn; Josef Knecht; Juraj Körbler; D Kouretas; Margaret R Krafft; Victor Kreitner; Ernst Kris; Lawrence S Kubie; Otakar Kucera; Herbert I Kupper; Erich Kussmann (re Edith Jacobson); Roger Money-Kyrle.
R Laforgue; D Lagache; Archdeacon J Malet Lambert (and 'The Times'); H Lampl; the Lancet; Karl Landauer; Chris Langlands; Israil Latif; Frederick Laws; Yves le Lay; Ronald Leggett; G Legman; Max Lerner; Simon O Lesser; S J Leuba; L Levy; Bertram D Lewin; H B Lewinson; Ena Lewisohn; Clarence W Lieb; Hans Liebermann; Lifwynn Foundation; T[?] Llewellyn[?]; Elizabeth Lloyd (also known as Beti/Betty Bwt/But); Rudolph M Loewenstein; Louis S London; London School of Hygiene and Tropical Medicine; Sandor Lorand; Los Angeles Psychoanalytical Society; Henry Lowenfeld; Lyceum Club.
Bob Langs; Moses Laufer; W Ralph Layland; P. J. van der Leeuw; John A. Lindon; Suzanne Little.
Otto Maas; Ida MacAlpine; John T MacCurdy; Ronald A Macdonald; [?] MacNaughton; F Alexander Magoun; Lillian Malcove; Ronald A Malt; Ludwig Marcuse; Marlborough; Lilly Freud-Marlé; Kiyoyasu Marui; Arthur Mayer; J E McAuley; Michael D McCready; William McDougall; L Melamed; P H Meldrum; Heinrich Meng; Menninger Clinic; M P K Menon; Kenneth Menzies; Meridian Books; G Gutiérrez Merino; Philip Merlan; Bruce R Merrill; Adolf Meyer (see also ref. P04-C-D-10); Adolph F Meyer; Monroe Meyer; L S Michaelis; W M Millar; Dennis Milner; Donald Mitchell; Mohr; der Monat (journal); S J R de Monchy; Monthly Magazines Ltd.; Stuart Moore; Willy Morel; William Morris; Minnie Mortimer; Frederick W Mott; Cavendish Moxon; Werner Münsterberger; M A Murray (to a Dr Hopkins); C S Myers.
Anthony J Mander; Marc [?]; R. P. Michael; Alain de Mijolla.
David Nabarro; S Nacht (re Edith Jacobson); L B Namier; National Broadcasting Company Inc.; J Nedava; Charles Neider; Lowry Nelson; Lily Neurath; New York Medical Journal; New York Psychoanalytic Society; Nick Nicholls; Dudley Nichols; Nicolson; William G Niederland; M C Mackenzie-van der Noordaa; Roger North; Sydney Northcote; Herman Nunberg; T Percy Nunn.
Fayek Nakhla; Amelie Noack.
Akiko Osodo.
The Observer; Howard Ogdon; Kenji Ohtsuki; Stanley L Olinick; H J Orkin; R Osborn; Oxford University Medical Society.