21. Sins of the fathers Publication: [Canada] : Canadian Motion Picture Productions, c1948 Subject(s): Mass ScreeningPublic HealthSyphilis -- prevention & controlSyphilis -- transmission
22. [Men being tested for spotted fever by scientists from the Rocky Mountain Laboratory in Hamilton, Montana] Publication: [Hamilton, Mont. : Rocky Mountain Laboratory, 1930?] Subject(s): Rocky Mountain Spotted Fever -- diagnosisMass ScreeningMontana
23. Rubella (German measles) screening program Publication: [Bethesda, Md. : Medical Arts and Photography Branch, National Institutes of Health, 19--?] Subject(s): Rubella -- immunologyInfant, Newborn, Diseases -- prevention & controlMass Screening