title: Donora, Pennsylvania: an environmental disaster of the 20th century.
authors: History of Medicine Division, National Library of Medicine, Bethesda, Md. 20894, USA.
authors: W H
authors: WH
authors: Helfand
authors: J
authors: J
authors: Lazarus
authors: P
authors: P
authors: Theerman
mesh_terms: D000397:Air Pollution / Q000266:history / Q000331:legislation & jurisprudence; D004190:Disasters / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D010414:Pennsylvania; D012905:Smog / Q000009:adverse effects*; D014481:United States
chemical_list: D012905:Smog