11. [George D. Clayton prepares a measuring device on a hill overlooking zinc plant in Donora, Pa.] Publication: [United States: , 1949] Subject(s): Public Health
12. [George Clayton and Dr. Harold J. Paulus prepare equipment for smog test] Publication: [United States: , 1949] Subject(s): Public Health
13. Donora, Pa., shortly after the smog episode of 1948 Publication: [United States: , 1949] Subject(s): Public Health
14. Children play in smog across river in Webster, Pa Publication: [United States: , 1949] Subject(s): Public Health