1. Let's wipe out polio with Salk vaccine Publication: 1955? Subject(s): Poliovirus VaccinesPoliomyelitis -- prevention & controlHealth Promotion
2. Typhus control Publication: [New York, N.Y.? : s.n., 1950?] Subject(s): Typhus, Epidemic Louse-Borne -- prevention & controlMotor VehiclesHealth Promotion