- Letter from C. Everett Koop to Morris B. Abram1
- Letter from C. Everett Koop to Mr. and Mrs. McGrade1
- Letter from C. Everett Koop to Robert P. Losey, California Pediatric Center1
- Letter from C. Everett Koop to Russell S. Boles, Jr1
- Letter from C. Everett Koop to Ruth H. Bock, Children's Hospital National Medical Center1
- Letter from C. Everett Koop to William French Smith, United States Office of the Attorney General1
- Letter from Charles W. Gish, Indiana State Board of Health, Division of Dental Health to C. Everett Koop1
- Letter from Charlotte Cunningham-Rundles to Joshua Lederberg1
- Letter from Chauncey Starr, Electric Power Research Institute to Joshua Lederberg2
- Letter from Christian B. Anfinsen to Alexander Mikhailovich Rekunkov1
- Letter from David Kalergis to Joshua Lederberg1
- Letter from Denton A. Cooley to Henry Swan1
- Letter from Diane L. Schweber to C. Everett Koop1
- Letter from Donald A. Glaser to Joshua Lederberg1
- Letter from Donald C. Harrison, American Heart Association to Edwin Meese1
- Letter from Donald S. Fredrickson to Evelyn Attix, National Institutes of Health1
- Letter from Donald W. Denny, University of Pittsburgh School of Medicine to C. Everett Koop1
- Letter from Dwight E. Harken to Henry Swan1
- Letter from Edmund C. Casey, American Lung Association to President Ronald Reagan1
- Letter from Edward D. Viner to C. Everett Koop1