191. Your health department Publication: [Indianapolis, IN] : The Company, [1941] Subject(s): Public HealthUnited States
192. Save a day Publication: [Washington, DC] : The Service, [1941] Subject(s): Accidents, Occupational -- prevention & controlOccupational MedicineProtective DevicesUnited States
193. What Is Psychiatry? Publication: Produced: 3 December 1941 Subject(s): Psychiatry Archival Collection: The Alan Gregg Papers (Profiles in Science)
194. Letter from A. D. Hershey to Michael Heidelberger Publication: Produced: [10 April 1941] Subject(s): Antigen-Antibody ReactionsBacteriophagesKinetics Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
195. Letter from Michael Heidelberger to A. D. Hershey Publication: Produced: 28 April 1941 Subject(s): Antigen-Antibody ReactionsBacteriophagesKinetics Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
196. Letter from A. D. Hershey to Michael Heidelberger Publication: Produced: 1 May 1941 Subject(s): Antigen-Antibody ReactionsBacteriophagesKinetics Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
197. Letter from Florence R. Sabin to Michael Heidelberger Publication: Produced: 24 October 1941 Subject(s): Antigen-Antibody Reactions Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
198. Letter from Colin M. MacLeod to Michael Heidelberger Publication: Produced: 20 May 1941 Subject(s): VaccinesPolysaccharidesPneumococcal Infections Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
199. Quantitative Chemical Studies on Complement or Alexin: I. A Method Publication: Rockefeller Institute for Medical Research, June 1941 Subject(s): Complement System Proteins Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
200. Quantitative Chemical Studies on Complement or Alexin: II. The Interrelation of Complement with Antigen-Antibody Compounds and with Sensitized Red Cells Publication: Rockefeller Institute for Medical Research, June 1941 Subject(s): Antigen-Antibody ComplexComplement System Proteins Archival Collection: The Michael Heidelberger Papers (Profiles in Science)