1. Letter from Paul Webbink to Joseph H. Willits Publication: Produced: 6 April 1940 Subject(s): Insurance, HealthSocial SecurityResearch Support as Topic Archival Collection: The Alan Gregg Papers (Profiles in Science)
2. Memorandum from Alan Gregg to Joseph H. Willits Publication: Produced: 26 June 1940 Subject(s): Insurance, HealthSocial SecurityResearch Support as Topic Archival Collection: The Alan Gregg Papers (Profiles in Science)