"Air Pollutants poisoning." . . "Air Pollution adverse effects" . . "Air pollution in Donora, Pa., epidemiology of the unusual smog episode of Oct. 1948"@en . . "Air pollution in Donora, Pa. epidemiology of unusual smog episode of October 1948 ; preliminary report"@en . . . . . "Air pollution in Donora, Pa. : epidemiology of the unusual smog episode of October 1948 : preliminary report" . . "Air pollution in Donora (Pa) Epidemiology of the unusual smog episode of October 1948" . . . . . "Airpollution in Donora, Pa: epidemiology of the unusual smog episode of October 1948; preliminary report" . . . . "Air pollution in Donora, Pa. : epidemiology of the unusual smog episode of October 1948" . . . "Air Pollution in Donora, Pa. Epidemiology of the unusual smog episode of October 1948. Preliminary report. [By] H.H. Schrenk [and others], etc. [With plates.]"@en . . "Air Pollution in Donora, Pa. Epidemiology of the unusual smog episode of October 1948. Preliminary report. [By] H. H. Schrenk [and others], etc. [With plates.]" . . . . . . . . . . . . . . "Air pollution in Donora, Pa. : epidemiology of unusual smog episode of october 1948" . . "Air pollution in Donora, Pa : epidemiology of the unusual smog episode of October 1948 : preliminary report" . . . . "Air pollution in Donora, Pa.; epidemiology of unusual smog episode of October 1948; preliminary report" . . . . . . . . . . . . . . . "Air pollution in Donora, Pa., epidemiology of the unusual smog episode of October 1948, preliminary report : H. H. Schrenk, Harry Heimann, George D. Clayton, W. M. Gafafer,... Harry Wexler" . . . "Poluicao Do Ar (Prevencao Controle)" . . "Aire Contaminación." . . "Air pollution." . . "Air Pollution." . . . "Air Pollution Pennsylvanie Donora." . . "Respiratory Tract Diseases chemically induced" . . "Respiratory Tract Diseases epidemiology Pennsylvania" . . "Air Pollution Effets physiologiques." . . "Pennsylvania." . .